78525953 has 4 divisors (see below), whose sum is σ = 85664688. Its totient is φ = 71387220.

The previous prime is 78525901. The next prime is 78525977. The reversal of 78525953 is 35952587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35952587 = 11 ⋅3268417.

It is a cyclic number.

It is not a de Polignac number, because 78525953 - 2²⁶ = 11417089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78528953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3569351 + ... + 3569372.

It is an arithmetic number, because the mean of its divisors is an integer number (21416172).

Almost surely, 2^78525953 is an apocalyptic number.

It is an amenable number.

78525953 is a deficient number, since it is larger than the sum of its proper divisors (7138735).

78525953 is a wasteful number, since it uses less digits than its factorization.

78525953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138734.

The product of its digits is 378000, while the sum is 44.

The square root of 78525953 is about 8861.4870648216. The cubic root of 78525953 is about 428.2240671022.

The spelling of 78525953 in words is "seventy-eight million, five hundred twenty-five thousand, nine hundred fifty-three".