77988325 has 6 divisors (see below), whose sum is σ = 96705554. Its totient is φ = 62390640.

The previous prime is 77988319. The next prime is 77988349. The reversal of 77988325 is 52388977.

It can be written as a sum of positive squares in 3 ways, for example, as 1764 + 77986561 = 42^2 + 8831^2 .

It is not a de Polignac number, because 77988325 - 2⁹ = 77987813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1559742 + ... + 1559791.

Almost surely, 2^77988325 is an apocalyptic number.

It is an amenable number.

77988325 is a deficient number, since it is larger than the sum of its proper divisors (18717229).

77988325 is a wasteful number, since it uses less digits than its factorization.

77988325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119543 (or 3119538 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 77988325 is about 8831.0998748740. The cubic root of 77988325 is about 427.2445494608.

The spelling of 77988325 in words is "seventy-seven million, nine hundred eighty-eight thousand, three hundred twenty-five".