78113997 has 96 divisors (see below), whose sum is σ = 142300800. Its totient is φ = 42052608.

The previous prime is 78113983. The next prime is 78114007. The reversal of 78113997 is 79931187.

It is not a de Polignac number, because 78113997 - 2⁸ = 78113741 is a prime.

It is a super-2 number, since 2×78113997² = 12203593054632018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78113927) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1473823 + ... + 1473875.

It is an arithmetic number, because the mean of its divisors is an integer number (1482300).

Almost surely, 2^78113997 is an apocalyptic number.

It is an amenable number.

78113997 is a deficient number, since it is larger than the sum of its proper divisors (64186803).

78113997 is a wasteful number, since it uses less digits than its factorization.

78113997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 105 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 78113997 is about 8838.2123192419. The cubic root of 78113997 is about 427.4739165372.

The spelling of 78113997 in words is "seventy-eight million, one hundred thirteen thousand, nine hundred ninety-seven".