513136649 has 2 divisors, whose sum is σ = 513136650. Its totient is φ = 513136648.

The previous prime is 513136633. The next prime is 513136681. The reversal of 513136649 is 946631315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 509314624 + 3822025 = 22568^2 + 1955^2 .

It is a cyclic number.

It is not a de Polignac number, because 513136649 - 2⁴ = 513136633 is a prime.

It is not a weakly prime, because it can be changed into another prime (513136699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256568324 + 256568325.

It is an arithmetic number, because the mean of its divisors is an integer number (256568325).

Almost surely, 2^513136649 is an apocalyptic number.

It is an amenable number.

513136649 is a deficient number, since it is larger than the sum of its proper divisors (1).

513136649 is an equidigital number, since it uses as much as digits as its factorization.

513136649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 513136649 is about 22652.5197053220. The cubic root of 513136649 is about 800.5915671401.

The spelling of 513136649 in words is "five hundred thirteen million, one hundred thirty-six thousand, six hundred forty-nine".