673487513 has 2 divisors, whose sum is σ = 673487514. Its totient is φ = 673487512.

The previous prime is 673487501. The next prime is 673487527. The reversal of 673487513 is 315784376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 575616064 + 97871449 = 23992^2 + 9893^2 .

It is a cyclic number.

It is not a de Polignac number, because 673487513 - 2⁸ = 673487257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (673487413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336743756 + 336743757.

It is an arithmetic number, because the mean of its divisors is an integer number (336743757).

Almost surely, 2^673487513 is an apocalyptic number.

It is an amenable number.

673487513 is a deficient number, since it is larger than the sum of its proper divisors (1).

673487513 is an equidigital number, since it uses as much as digits as its factorization.

673487513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 44.

The square root of 673487513 is about 25951.6379637201. The cubic root of 673487513 is about 876.5496405511.

The spelling of 673487513 in words is "six hundred seventy-three million, four hundred eighty-seven thousand, five hundred thirteen".