78955317 has 72 divisors (see below), whose sum is σ = 145236000. Its totient is φ = 42620256.

The previous prime is 78955243. The next prime is 78955369. The reversal of 78955317 is 71355987.

78955317 is a `hidden beast` number, since 7 + 89 + 553 + 17 = 666.

It is not a de Polignac number, because 78955317 - 2¹² = 78951221 is a prime.

Its product of digits (264600) is a multiple of the sum of its prime divisors (378).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78955397) 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 71 ways as a sum of consecutive naturals, for example, 226059 + ... + 226407.

Almost surely, 2^78955317 is an apocalyptic number.

It is an amenable number.

78955317 is a deficient number, since it is larger than the sum of its proper divisors (66280683).

78955317 is a wasteful number, since it uses less digits than its factorization.

78955317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 378 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 78955317 is about 8885.6804466512. The cubic root of 78955317 is about 429.0031297146.

The spelling of 78955317 in words is "seventy-eight million, nine hundred fifty-five thousand, three hundred seventeen".