647299013 has 2 divisors, whose sum is σ = 647299014. Its totient is φ = 647299012.

The previous prime is 647298943. The next prime is 647299057. The reversal of 647299013 is 310992746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 604028929 + 43270084 = 24577^2 + 6578^2 .

It is a cyclic number.

It is not a de Polignac number, because 647299013 - 2²⁴ = 630521797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647299063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323649506 + 323649507.

It is an arithmetic number, because the mean of its divisors is an integer number (323649507).

Almost surely, 2^647299013 is an apocalyptic number.

It is an amenable number.

647299013 is a deficient number, since it is larger than the sum of its proper divisors (1).

647299013 is an equidigital number, since it uses as much as digits as its factorization.

647299013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 647299013 is about 25442.0717120285. The cubic root of 647299013 is about 865.0375931182.

The spelling of 647299013 in words is "six hundred forty-seven million, two hundred ninety-nine thousand, thirteen".