520412491 has 2 divisors, whose sum is σ = 520412492. Its totient is φ = 520412490.

The previous prime is 520412479. The next prime is 520412539. The reversal of 520412491 is 194214025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520412491 - 2¹³ = 520404299 is a prime.

It is not a weakly prime, because it can be changed into another prime (520412441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260206245 + 260206246.

It is an arithmetic number, because the mean of its divisors is an integer number (260206246).

Almost surely, 2^520412491 is an apocalyptic number.

520412491 is a deficient number, since it is larger than the sum of its proper divisors (1).

520412491 is an equidigital number, since it uses as much as digits as its factorization.

520412491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 520412491 is about 22812.5511725453. The cubic root of 520412491 is about 804.3577254156.

The spelling of 520412491 in words is "five hundred twenty million, four hundred twelve thousand, four hundred ninety-one".