520420919 has 2 divisors, whose sum is σ = 520420920. Its totient is φ = 520420918.

The previous prime is 520420909. The next prime is 520420933. The reversal of 520420919 is 919024025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520420919 - 2²⁴ = 503643703 is a prime.

It is a super-2 number, since 2×520420919² = 541675865865609122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520420909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260210459 + 260210460.

It is an arithmetic number, because the mean of its divisors is an integer number (260210460).

Almost surely, 2^520420919 is an apocalyptic number.

520420919 is a deficient number, since it is larger than the sum of its proper divisors (1).

520420919 is an equidigital number, since it uses as much as digits as its factorization.

520420919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 520420919 is about 22812.7358946708. The cubic root of 520420919 is about 804.3620675419.

The spelling of 520420919 in words is "five hundred twenty million, four hundred twenty thousand, nine hundred nineteen".