513612623 has 2 divisors, whose sum is σ = 513612624. Its totient is φ = 513612622.

The previous prime is 513612611. The next prime is 513612629. The reversal of 513612623 is 326216315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513612623 - 2²⁰ = 512564047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513612629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256806311 + 256806312.

It is an arithmetic number, because the mean of its divisors is an integer number (256806312).

Almost surely, 2^513612623 is an apocalyptic number.

513612623 is a deficient number, since it is larger than the sum of its proper divisors (1).

513612623 is an equidigital number, since it uses as much as digits as its factorization.

513612623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 513612623 is about 22663.0232537497. The cubic root of 513612623 is about 800.8390275458.

Adding to 513612623 its reverse (326216315), we get a palindrome (839828938).

The spelling of 513612623 in words is "five hundred thirteen million, six hundred twelve thousand, six hundred twenty-three".