78135967 has 18 divisors (see below), whose sum is σ = 97073448. Its totient is φ = 61581312.

The previous prime is 78135943. The next prime is 78135979. The reversal of 78135967 is 76953187.

It is not a de Polignac number, because 78135967 - 2⁷ = 78135839 is a prime.

It is a super-2 number, since 2×78135967² = 12210458678050178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78135907) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 303903 + ... + 304159.

Almost surely, 2^78135967 is an apocalyptic number.

78135967 is a deficient number, since it is larger than the sum of its proper divisors (18937481).

78135967 is an equidigital number, since it uses as much as digits as its factorization.

78135967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 277 counting only the distinct ones).

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

The square root of 78135967 is about 8839.4551302668. The cubic root of 78135967 is about 427.5139892599.

The spelling of 78135967 in words is "seventy-eight million, one hundred thirty-five thousand, nine hundred sixty-seven".