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80379169 = 1343143791
BaseRepresentation
bin1001100101001…
…11110100100001
312121020200111021
410302213310201
5131034113134
611550445441
71664132413
oct462476441
9177220437
1080379169
1141410072
1222b03881
1313863b50
14a9649b3
1570cb0b4
hex4ca7d21

80379169 has 8 divisors (see below), whose sum is σ = 88575872. Its totient is φ = 72470160.

The previous prime is 80379157. The next prime is 80379191. The reversal of 80379169 is 96197308.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-80379169 is a prime.

It is a super-2 number, since 2×803791692 = 12921621618261122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (80379119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71337 + ... + 72454.

It is an arithmetic number, because the mean of its divisors is an integer number (11071984).

Almost surely, 280379169 is an apocalyptic number.

It is an amenable number.

80379169 is a deficient number, since it is larger than the sum of its proper divisors (8196703).

80379169 is a wasteful number, since it uses less digits than its factorization.

80379169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143847.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 80379169 is about 8965.4430453826. The cubic root of 80379169 is about 431.5666110449.

The spelling of 80379169 in words is "eighty million, three hundred seventy-nine thousand, one hundred sixty-nine".

Divisors: 1 13 43 559 143791 1869283 6183013 80379169