513002921 has 2 divisors, whose sum is σ = 513002922. Its totient is φ = 513002920.

The previous prime is 513002881. The next prime is 513002927. The reversal of 513002921 is 129200315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373880896 + 139122025 = 19336^2 + 11795^2 .

It is a cyclic number.

It is not a de Polignac number, because 513002921 - 2²² = 508808617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (513002927) 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, 256501460 + 256501461.

It is an arithmetic number, because the mean of its divisors is an integer number (256501461).

Almost surely, 2^513002921 is an apocalyptic number.

It is an amenable number.

513002921 is a deficient number, since it is larger than the sum of its proper divisors (1).

513002921 is an equidigital number, since it uses as much as digits as its factorization.

513002921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 513002921 is about 22649.5677883707. The cubic root of 513002921 is about 800.5220139902.

The spelling of 513002921 in words is "five hundred thirteen million, two thousand, nine hundred twenty-one".