78963531 has 8 divisors (see below), whose sum is σ = 109862400. Its totient is φ = 50353512.

The previous prime is 78963527. The next prime is 78963571. The reversal of 78963531 is 13536987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78963531 - 2² = 78963527 is a prime.

It is a super-2 number, since 2×78963531² = 12470478455975922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78963571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572131 + ... + 572268.

It is an arithmetic number, because the mean of its divisors is an integer number (13732800).

Almost surely, 2^78963531 is an apocalyptic number.

78963531 is a deficient number, since it is larger than the sum of its proper divisors (30898869).

78963531 is a wasteful number, since it uses less digits than its factorization.

78963531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144425.

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

The square root of 78963531 is about 8886.1426389632. The cubic root of 78963531 is about 429.0180061014.

The spelling of 78963531 in words is "seventy-eight million, nine hundred sixty-three thousand, five hundred thirty-one".