673508513 has 2 divisors, whose sum is σ = 673508514. Its totient is φ = 673508512.

The previous prime is 673508497. The next prime is 673508623. The reversal of 673508513 is 315805376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673506304 + 2209 = 25952^2 + 47^2 .

It is a cyclic number.

It is not a de Polignac number, because 673508513 - 2⁴ = 673508497 is a prime.

It is a super-2 number, since 2×673508513² = 907227434166942338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (673501513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336754256 + 336754257.

It is an arithmetic number, because the mean of its divisors is an integer number (336754257).

Almost surely, 2^673508513 is an apocalyptic number.

It is an amenable number.

673508513 is a deficient number, since it is larger than the sum of its proper divisors (1).

673508513 is an equidigital number, since it uses as much as digits as its factorization.

673508513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 673508513 is about 25952.0425593054. The cubic root of 673508513 is about 876.5587510151.

The spelling of 673508513 in words is "six hundred seventy-three million, five hundred eight thousand, five hundred thirteen".