78331197 has 16 divisors (see below), whose sum is σ = 122274432. Its totient is φ = 43668480.

The previous prime is 78331181. The next prime is 78331199. The reversal of 78331197 is 79113387.

It is a happy number.

It is not a de Polignac number, because 78331197 - 2⁴ = 78331181 is a prime.

It is a super-2 number, since 2×78331197² = 12271552846905618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78331199) 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, 44628 + ... + 46349.

It is an arithmetic number, because the mean of its divisors is an integer number (7642152).

Almost surely, 2^78331197 is an apocalyptic number.

It is an amenable number.

78331197 is a deficient number, since it is larger than the sum of its proper divisors (43943235).

78331197 is a wasteful number, since it uses less digits than its factorization.

78331197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91028.

The product of its digits is 31752, while the sum is 39.

The square root of 78331197 is about 8850.4913422928. The cubic root of 78331197 is about 427.8697543099.

The spelling of 78331197 in words is "seventy-eight million, three hundred thirty-one thousand, one hundred ninety-seven".