Search a number
7897082243 = 9781413219
BaseRepresentation
bin1110101101011001…
…11110100110000011
3202101100202100021112
413112230332212003
5112133123112433
63343341513535
7366461043251
oct72654764603
922340670245
107897082243
113392773856
1216448728ab
1398b11a53b
1454cb575d1
1531346b348
hex1d6b3e983

7897082243 has 4 divisors (see below), whose sum is σ = 7978495560. Its totient is φ = 7815668928.

The previous prime is 7897082239. The next prime is 7897082261. The reversal of 7897082243 is 3422807987.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7897082243 - 22 = 7897082239 is a prime.

It is a super-2 number, since 2×78970822432 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7897082191 and 7897082200.

It is not an unprimeable number, because it can be changed into a prime (7897082443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40706513 + ... + 40706706.

It is an arithmetic number, because the mean of its divisors is an integer number (1994623890).

Almost surely, 27897082243 is an apocalyptic number.

7897082243 is a deficient number, since it is larger than the sum of its proper divisors (81413317).

7897082243 is an equidigital number, since it uses as much as digits as its factorization.

7897082243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81413316.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The square root of 7897082243 is about 88865.5289918425. The cubic root of 7897082243 is about 1991.3864771169.

The spelling of 7897082243 in words is "seven billion, eight hundred ninety-seven million, eighty-two thousand, two hundred forty-three".

Divisors: 1 97 81413219 7897082243