78129963 has 12 divisors (see below), whose sum is σ = 113019088. Its totient is φ = 52010640.

The previous prime is 78129949. The next prime is 78129971. The reversal of 78129963 is 36992187.

It is not a de Polignac number, because 78129963 - 2⁸ = 78129707 is a prime.

It is a super-2 number, since 2×78129963² = 12208582236762738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78129923) 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, 573 + ... + 12513.

Almost surely, 2^78129963 is an apocalyptic number.

78129963 is a deficient number, since it is larger than the sum of its proper divisors (34889125).

78129963 is a wasteful number, since it uses less digits than its factorization.

78129963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12674 (or 12671 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 78129963 is about 8839.1155100496. The cubic root of 78129963 is about 427.5030388622.

The spelling of 78129963 in words is "seventy-eight million, one hundred twenty-nine thousand, nine hundred sixty-three".