78071967 has 12 divisors (see below), whose sum is σ = 114316384. Its totient is φ = 51334560.

The previous prime is 78071963. The next prime is 78071989. The reversal of 78071967 is 76917087.

It is a happy number.

It is not a de Polignac number, because 78071967 - 2² = 78071963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78071963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58759 + ... + 60072.

Almost surely, 2^78071967 is an apocalyptic number.

78071967 is a deficient number, since it is larger than the sum of its proper divisors (36244417).

78071967 is a wasteful number, since it uses less digits than its factorization.

78071967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118910 (or 118907 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 78071967 is about 8835.8342560281. The cubic root of 78071967 is about 427.3972339419.

The spelling of 78071967 in words is "seventy-eight million, seventy-one thousand, nine hundred sixty-seven".