78523797 has 12 divisors (see below), whose sum is σ = 115082240. Its totient is φ = 47589960.

The previous prime is 78523759. The next prime is 78523807. The reversal of 78523797 is 79732587.

It is not a de Polignac number, because 78523797 - 2¹⁵ = 78491029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78523717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107797 + ... + 108522.

Almost surely, 2^78523797 is an apocalyptic number.

It is an amenable number.

78523797 is a deficient number, since it is larger than the sum of its proper divisors (36558443).

78523797 is a wasteful number, since it uses less digits than its factorization.

78523797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216344 (or 216333 counting only the distinct ones).

The product of its digits is 740880, while the sum is 48.

The square root of 78523797 is about 8861.3654139754. The cubic root of 78523797 is about 428.2201479753.

The spelling of 78523797 in words is "seventy-eight million, five hundred twenty-three thousand, seven hundred ninety-seven".