876571961 has 2 divisors, whose sum is σ = 876571962. Its totient is φ = 876571960.

The previous prime is 876571939. The next prime is 876571963. The reversal of 876571961 is 169175678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 537312400 + 339259561 = 23180^2 + 18419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-876571961 is a prime.

It is a super-2 number, since 2×876571961² = 1536756805622771042, which contains 22 as substring.

Together with 876571963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (876571963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438285980 + 438285981.

It is an arithmetic number, because the mean of its divisors is an integer number (438285981).

Almost surely, 2^876571961 is an apocalyptic number.

It is an amenable number.

876571961 is a deficient number, since it is larger than the sum of its proper divisors (1).

876571961 is an equidigital number, since it uses as much as digits as its factorization.

876571961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 50.

The square root of 876571961 is about 29606.9579828796. The cubic root of 876571961 is about 957.0380207690.

The spelling of 876571961 in words is "eight hundred seventy-six million, five hundred seventy-one thousand, nine hundred sixty-one".