671558297 has 2 divisors, whose sum is σ = 671558298. Its totient is φ = 671558296.

The previous prime is 671558291. The next prime is 671558341. The reversal of 671558297 is 792855176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669567376 + 1990921 = 25876^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 671558297 - 2⁶ = 671558233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671558291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335779148 + 335779149.

It is an arithmetic number, because the mean of its divisors is an integer number (335779149).

Almost surely, 2^671558297 is an apocalyptic number.

It is an amenable number.

671558297 is a deficient number, since it is larger than the sum of its proper divisors (1).

671558297 is an equidigital number, since it uses as much as digits as its factorization.

671558297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 50.

The square root of 671558297 is about 25914.4418616338. The cubic root of 671558297 is about 875.7118765160.

The spelling of 671558297 in words is "six hundred seventy-one million, five hundred fifty-eight thousand, two hundred ninety-seven".