78992125 has 8 divisors (see below), whose sum is σ = 98582328. Its totient is φ = 63193600.

The previous prime is 78992107. The next prime is 78992131. The reversal of 78992125 is 52129987.

It can be written as a sum of positive squares in 4 ways, for example, as 13155129 + 65836996 = 3627^2 + 8114^2 .

It is not a de Polignac number, because 78992125 - 2⁵ = 78992093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315844 + ... + 316093.

It is an arithmetic number, because the mean of its divisors is an integer number (12322791).

Almost surely, 2^78992125 is an apocalyptic number.

It is an amenable number.

78992125 is a deficient number, since it is larger than the sum of its proper divisors (19590203).

78992125 is an equidigital number, since it uses as much as digits as its factorization.

78992125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631952 (or 631942 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 78992125 is about 8887.7514029140. The cubic root of 78992125 is about 429.0697846895.

The spelling of 78992125 in words is "seventy-eight million, nine hundred ninety-two thousand, one hundred twenty-five".