78916497 has 16 divisors (see below), whose sum is σ = 116244480. Its totient is φ = 47221200.

The previous prime is 78916489. The next prime is 78916501. The reversal of 78916497 is 79461987.

It is not a de Polignac number, because 78916497 - 2³ = 78916489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78916697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12529 + ... + 17742.

It is an arithmetic number, because the mean of its divisors is an integer number (7265280).

Almost surely, 2^78916497 is an apocalyptic number.

It is an amenable number.

78916497 is a deficient number, since it is larger than the sum of its proper divisors (37327983).

78916497 is a wasteful number, since it uses less digits than its factorization.

78916497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30364.

The product of its digits is 762048, while the sum is 51.

The square root of 78916497 is about 8883.4957646188. The cubic root of 78916497 is about 428.9328087943.

Subtracting 78916497 from its reverse (79461987), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 78916497 in words is "seventy-eight million, nine hundred sixteen thousand, four hundred ninety-seven".