513139901 has 2 divisors, whose sum is σ = 513139902. Its totient is φ = 513139900.

The previous prime is 513139877. The next prime is 513139909. The reversal of 513139901 is 109931315.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426463801 + 86676100 = 20651^2 + 9310^2 .

It is a cyclic number.

It is not a de Polignac number, because 513139901 - 2¹⁴ = 513123517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513139909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256569950 + 256569951.

It is an arithmetic number, because the mean of its divisors is an integer number (256569951).

Almost surely, 2^513139901 is an apocalyptic number.

It is an amenable number.

513139901 is a deficient number, since it is larger than the sum of its proper divisors (1).

513139901 is an equidigital number, since it uses as much as digits as its factorization.

513139901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 32.

The square root of 513139901 is about 22652.5914853025. The cubic root of 513139901 is about 800.5932583844.

The spelling of 513139901 in words is "five hundred thirteen million, one hundred thirty-nine thousand, nine hundred one".