77525313 has 4 divisors (see below), whose sum is σ = 103367088. Its totient is φ = 51683540.

The previous prime is 77525309. The next prime is 77525317. The reversal of 77525313 is 31352577.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (77525309) and next prime (77525317).

It is a cyclic number.

It is not a de Polignac number, because 77525313 - 2² = 77525309 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77525317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12920883 + ... + 12920888.

It is an arithmetic number, because the mean of its divisors is an integer number (25841772).

Almost surely, 2^77525313 is an apocalyptic number.

It is an amenable number.

77525313 is a deficient number, since it is larger than the sum of its proper divisors (25841775).

77525313 is a wasteful number, since it uses less digits than its factorization.

77525313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25841774.

The product of its digits is 22050, while the sum is 33.

The square root of 77525313 is about 8804.8459952460. The cubic root of 77525313 is about 426.3973622686.

The spelling of 77525313 in words is "seventy-seven million, five hundred twenty-five thousand, three hundred thirteen".