506686913 has 2 divisors, whose sum is σ = 506686914. Its totient is φ = 506686912.

The previous prime is 506686891. The next prime is 506686937. The reversal of 506686913 is 319686605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382319809 + 124367104 = 19553^2 + 11152^2 .

It is a cyclic number.

It is not a de Polignac number, because 506686913 - 2⁸ = 506686657 is a prime.

It is not a weakly prime, because it can be changed into another prime (506686963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253343456 + 253343457.

It is an arithmetic number, because the mean of its divisors is an integer number (253343457).

Almost surely, 2^506686913 is an apocalyptic number.

It is an amenable number.

506686913 is a deficient number, since it is larger than the sum of its proper divisors (1).

506686913 is an equidigital number, since it uses as much as digits as its factorization.

506686913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 506686913 is about 22509.7070838339. The cubic root of 506686913 is about 797.2231396479.

The spelling of 506686913 in words is "five hundred six million, six hundred eighty-six thousand, nine hundred thirteen".