77465925 has 18 divisors (see below), whose sum is σ = 138750482. Its totient is φ = 41315040.

The previous prime is 77465911. The next prime is 77465939. The reversal of 77465925 is 52956477.

It is an interprime number because it is at equal distance from previous prime (77465911) and next prime (77465939).

It can be written as a sum of positive squares in 3 ways, for example, as 2712609 + 74753316 = 1647^2 + 8646^2 .

It is not a de Polignac number, because 77465925 - 2⁵ = 77465893 is a prime.

It is a super-2 number, since 2×77465925² = 12001939072211250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a Curzon 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 17 ways as a sum of consecutive naturals, for example, 171922 + ... + 172371.

Almost surely, 2^77465925 is an apocalyptic number.

77465925 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77465925 is a deficient number, since it is larger than the sum of its proper divisors (61284557).

77465925 is a wasteful number, since it uses less digits than its factorization.

77465925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344309 (or 344301 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 77465925 is about 8801.4728881023. The cubic root of 77465925 is about 426.2884543756.

The spelling of 77465925 in words is "seventy-seven million, four hundred sixty-five thousand, nine hundred twenty-five".