77961875 has 10 divisors (see below), whose sum is σ = 97421940. Its totient is φ = 62369000.

The previous prime is 77961859. The next prime is 77961893. The reversal of 77961875 is 57816977.

It is not a de Polignac number, because 77961875 - 2⁴ = 77961859 is a prime.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 61745 + ... + 62994.

It is an arithmetic number, because the mean of its divisors is an integer number (9742194).

Almost surely, 2^77961875 is an apocalyptic number.

77961875 is a deficient number, since it is larger than the sum of its proper divisors (19460065).

77961875 is an equidigital number, since it uses as much as digits as its factorization.

77961875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124759 (or 124744 counting only the distinct ones).

The product of its digits is 740880, while the sum is 50.

The square root of 77961875 is about 8829.6021994199. The cubic root of 77961875 is about 427.1962435290.

The spelling of 77961875 in words is "seventy-seven million, nine hundred sixty-one thousand, eight hundred seventy-five".