671446913 has 2 divisors, whose sum is σ = 671446914. Its totient is φ = 671446912.

The previous prime is 671446907. The next prime is 671446927. The reversal of 671446913 is 319644176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 632421904 + 39025009 = 25148^2 + 6247^2 .

It is a cyclic number.

It is not a de Polignac number, because 671446913 - 2¹² = 671442817 is a prime.

It is not a weakly prime, because it can be changed into another prime (671446933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335723456 + 335723457.

It is an arithmetic number, because the mean of its divisors is an integer number (335723457).

Almost surely, 2^671446913 is an apocalyptic number.

It is an amenable number.

671446913 is a deficient number, since it is larger than the sum of its proper divisors (1).

671446913 is an equidigital number, since it uses as much as digits as its factorization.

671446913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 671446913 is about 25912.2927005697. The cubic root of 671446913 is about 875.6634589350.

The spelling of 671446913 in words is "six hundred seventy-one million, four hundred forty-six thousand, nine hundred thirteen".