77499425 has 6 divisors (see below), whose sum is σ = 96099318. Its totient is φ = 61999520.

The previous prime is 77499407. The next prime is 77499437. The reversal of 77499425 is 52499477.

It can be written as a sum of positive squares in 3 ways, for example, as 7006609 + 70492816 = 2647^2 + 8396^2 .

It is not a de Polignac number, because 77499425 - 2¹² = 77495329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77499425.

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, 1549964 + ... + 1550013.

It is an arithmetic number, because the mean of its divisors is an integer number (16016553).

Almost surely, 2^77499425 is an apocalyptic number.

It is an amenable number.

77499425 is a deficient number, since it is larger than the sum of its proper divisors (18599893).

77499425 is a wasteful number, since it uses less digits than its factorization.

77499425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3099987 (or 3099982 counting only the distinct ones).

The product of its digits is 635040, while the sum is 47.

The square root of 77499425 is about 8803.3757729635. The cubic root of 77499425 is about 426.3498947451.

The spelling of 77499425 in words is "seventy-seven million, four hundred ninety-nine thousand, four hundred twenty-five".