671874961 has 2 divisors, whose sum is σ = 671874962. Its totient is φ = 671874960.

The previous prime is 671874911. The next prime is 671875031. The reversal of 671874961 is 169478176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 671846400 + 28561 = 25920^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 671874961 - 2²⁹ = 135004049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671874911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335937480 + 335937481.

It is an arithmetic number, because the mean of its divisors is an integer number (335937481).

Almost surely, 2^671874961 is an apocalyptic number.

It is an amenable number.

671874961 is a deficient number, since it is larger than the sum of its proper divisors (1).

671874961 is an equidigital number, since it uses as much as digits as its factorization.

671874961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 671874961 is about 25920.5509393608. The cubic root of 671874961 is about 875.8494981500.

The spelling of 671874961 in words is "six hundred seventy-one million, eight hundred seventy-four thousand, nine hundred sixty-one".