77275025 has 6 divisors (see below), whose sum is σ = 95821062. Its totient is φ = 61820000.

The previous prime is 77275021. The next prime is 77275027. The reversal of 77275025 is 52057277.

It can be written as a sum of positive squares in 3 ways, for example, as 414736 + 76860289 = 644^2 + 8767^2 .

It is not a de Polignac number, because 77275025 - 2² = 77275021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77275021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1545476 + ... + 1545525.

It is an arithmetic number, because the mean of its divisors is an integer number (15970177).

Almost surely, 2^77275025 is an apocalyptic number.

It is an amenable number.

77275025 is a deficient number, since it is larger than the sum of its proper divisors (18546037).

77275025 is a wasteful number, since it uses less digits than its factorization.

77275025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091011 (or 3091006 counting only the distinct ones).

The product of its (nonzero) digits is 34300, while the sum is 35.

The square root of 77275025 is about 8790.6214228574. The cubic root of 77275025 is about 425.9379974711.

The spelling of 77275025 in words is "seventy-seven million, two hundred seventy-five thousand, twenty-five".