78331975 has 6 divisors (see below), whose sum is σ = 97131680. Its totient is φ = 62665560.

The previous prime is 78331973. The next prime is 78332021. The reversal of 78331975 is 57913387.

It is not a de Polignac number, because 78331975 - 2¹ = 78331973 is a prime.

It is a super-2 number, since 2×78331975² = 12271796614801250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78331973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1566615 + ... + 1566664.

Almost surely, 2^78331975 is an apocalyptic number.

78331975 is a deficient number, since it is larger than the sum of its proper divisors (18799705).

78331975 is a wasteful number, since it uses less digits than its factorization.

78331975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133289 (or 3133284 counting only the distinct ones).

The product of its digits is 158760, while the sum is 43.

The square root of 78331975 is about 8850.5352945457. The cubic root of 78331975 is about 427.8711708658.

The spelling of 78331975 in words is "seventy-eight million, three hundred thirty-one thousand, nine hundred seventy-five".