731505013 has 2 divisors, whose sum is σ = 731505014. Its totient is φ = 731505012.

The previous prime is 731505007. The next prime is 731505017. The reversal of 731505013 is 310505137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 368716804 + 362788209 = 19202^2 + 19047^2 .

It is a cyclic number.

It is not a de Polignac number, because 731505013 - 2²⁵ = 697950581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (731505017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365752506 + 365752507.

It is an arithmetic number, because the mean of its divisors is an integer number (365752507).

Almost surely, 2^731505013 is an apocalyptic number.

It is an amenable number.

731505013 is a deficient number, since it is larger than the sum of its proper divisors (1).

731505013 is an equidigital number, since it uses as much as digits as its factorization.

731505013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 731505013 is about 27046.3493470006. The cubic root of 731505013 is about 901.0296910274.

The spelling of 731505013 in words is "seven hundred thirty-one million, five hundred five thousand, thirteen".