78312753 has 12 divisors (see below), whose sum is σ = 113572368. Its totient is φ = 51999000.

The previous prime is 78312743. The next prime is 78312797. The reversal of 78312753 is 35721387.

It is not a de Polignac number, because 78312753 - 2⁸ = 78312497 is a prime.

It is a super-2 number, since 2×78312753² = 12265774564878018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78312713) 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, 15075 + ... + 19592.

It is an arithmetic number, because the mean of its divisors is an integer number (9464364).

Almost surely, 2^78312753 is an apocalyptic number.

It is an amenable number.

78312753 is a deficient number, since it is larger than the sum of its proper divisors (35259615).

78312753 is a wasteful number, since it uses less digits than its factorization.

78312753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34924 (or 34921 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 78312753 is about 8849.4493049003. The cubic root of 78312753 is about 427.8361693547.

The spelling of 78312753 in words is "seventy-eight million, three hundred twelve thousand, seven hundred fifty-three".