78525931 has 8 divisors (see below), whose sum is σ = 85796928. Its totient is φ = 71277000.

The previous prime is 78525901. The next prime is 78525977. The reversal of 78525931 is 13952587.

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

It is a cyclic number.

It is not a de Polignac number, because 78525931 - 2¹¹ = 78523883 is a prime.

It is a super-2 number, since 2×78525931² = 12332643678833522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78525901) 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, 2436 + ... + 12766.

It is an arithmetic number, because the mean of its divisors is an integer number (10724616).

Almost surely, 2^78525931 is an apocalyptic number.

78525931 is a deficient number, since it is larger than the sum of its proper divisors (7270997).

78525931 is a wasteful number, since it uses less digits than its factorization.

78525931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11033.

The product of its digits is 75600, while the sum is 40.

The square root of 78525931 is about 8861.4858234948. The cubic root of 78525931 is about 428.2240271115.

The spelling of 78525931 in words is "seventy-eight million, five hundred twenty-five thousand, nine hundred thirty-one".