76871961 has 24 divisors (see below), whose sum is σ = 112679424. Its totient is φ = 50497440.

The previous prime is 76871939. The next prime is 76871969. The reversal of 76871961 is 16917867.

It is not a de Polignac number, because 76871961 - 2⁷ = 76871833 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (76871969) 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 23 ways as a sum of consecutive naturals, for example, 338530 + ... + 338756.

It is an arithmetic number, because the mean of its divisors is an integer number (4694976).

Almost surely, 2^76871961 is an apocalyptic number.

It is an amenable number.

76871961 is a deficient number, since it is larger than the sum of its proper divisors (35807463).

76871961 is a wasteful number, since it uses less digits than its factorization.

76871961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 618 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 76871961 is about 8767.6656528406. The cubic root of 76871961 is about 425.1961465998.

The spelling of 76871961 in words is "seventy-six million, eight hundred seventy-one thousand, nine hundred sixty-one".