671377513 has 2 divisors, whose sum is σ = 671377514. Its totient is φ = 671377512.

The previous prime is 671377507. The next prime is 671377517. The reversal of 671377513 is 315773176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608460889 + 62916624 = 24667^2 + 7932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671377513 is a prime.

It is not a weakly prime, because it can be changed into another prime (671377517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335688756 + 335688757.

It is an arithmetic number, because the mean of its divisors is an integer number (335688757).

Almost surely, 2^671377513 is an apocalyptic number.

It is an amenable number.

671377513 is a deficient number, since it is larger than the sum of its proper divisors (1).

671377513 is an equidigital number, since it uses as much as digits as its factorization.

671377513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92610, while the sum is 40.

The square root of 671377513 is about 25910.9535332068. The cubic root of 671377513 is about 875.6332886978.

The spelling of 671377513 in words is "six hundred seventy-one million, three hundred seventy-seven thousand, five hundred thirteen".