78136975 has 24 divisors (see below), whose sum is σ = 111073248. Its totient is φ = 53414400.

The previous prime is 78136969. The next prime is 78136997. The reversal of 78136975 is 57963187.

It is not a de Polignac number, because 78136975 - 2⁵ = 78136943 is a prime.

It is a super-2 number, since 2×78136975² = 12210773724301250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90747 + ... + 91603.

It is an arithmetic number, because the mean of its divisors is an integer number (4628052).

Almost surely, 2^78136975 is an apocalyptic number.

78136975 is a deficient number, since it is larger than the sum of its proper divisors (32936273).

78136975 is a wasteful number, since it uses less digits than its factorization.

78136975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1390 counting only the distinct ones).

The product of its digits is 317520, while the sum is 46.

The square root of 78136975 is about 8839.5121471719. The cubic root of 78136975 is about 427.5158276460.

The spelling of 78136975 in words is "seventy-eight million, one hundred thirty-six thousand, nine hundred seventy-five".