78513963 has 16 divisors (see below), whose sum is σ = 117290496. Its totient is φ = 46297440.

The previous prime is 78513959. The next prime is 78513983. The reversal of 78513963 is 36931587.

It is not a de Polignac number, because 78513963 - 2² = 78513959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78513943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30931 + ... + 33372.

It is an arithmetic number, because the mean of its divisors is an integer number (7330656).

Almost surely, 2^78513963 is an apocalyptic number.

78513963 is a deficient number, since it is larger than the sum of its proper divisors (38776533).

78513963 is a wasteful number, since it uses less digits than its factorization.

78513963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64354.

The product of its digits is 136080, while the sum is 42.

The square root of 78513963 is about 8860.8105159743. The cubic root of 78513963 is about 428.2022710475.

The spelling of 78513963 in words is "seventy-eight million, five hundred thirteen thousand, nine hundred sixty-three".