Search a number
-
+
9997978 = 24998989
BaseRepresentation
bin100110001000…
…111010011010
3200210221122111
4212020322122
510024413403
6554142534
7150660424
oct46107232
920727574
109997978
1157096a1
123421a4a
1320c0983
141483814
15d2756d
hex988e9a

9997978 has 4 divisors (see below), whose sum is σ = 14996970. Its totient is φ = 4998988.

The previous prime is 9997969. The next prime is 9997987. The reversal of 9997978 is 8797999.

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

It is an interprime number because it is at equal distance from previous prime (9997969) and next prime (9997987).

It can be written as a sum of positive squares in only one way, i.e., 9966649 + 31329 = 3157^2 + 177^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499493 + ... + 2499496.

Almost surely, 29997978 is an apocalyptic number.

9997978 is a deficient number, since it is larger than the sum of its proper divisors (4998992).

9997978 is a wasteful number, since it uses less digits than its factorization.

9997978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998991.

The product of its digits is 2571912, while the sum is 58.

The square root of 9997978 is about 3161.9579377342. The cubic root of 9997978 is about 215.4289471346.

The spelling of 9997978 in words is "nine million, nine hundred ninety-seven thousand, nine hundred seventy-eight".

Divisors: 1 2 4998989 9997978