520419491 has 2 divisors, whose sum is σ = 520419492. Its totient is φ = 520419490.

The previous prime is 520419463. The next prime is 520419509. The reversal of 520419491 is 194914025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520419491 is a prime.

It is a super-2 number, since 2×520419491² = 541672893225398162, which contains 22 as substring.

It is a Chen prime.

It is equal to p_27373454 and since 520419491 and 27373454 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (520419461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260209745 + 260209746.

It is an arithmetic number, because the mean of its divisors is an integer number (260209746).

Almost surely, 2^520419491 is an apocalyptic number.

520419491 is a deficient number, since it is larger than the sum of its proper divisors (1).

520419491 is an equidigital number, since it uses as much as digits as its factorization.

520419491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 520419491 is about 22812.7045963428. The cubic root of 520419491 is about 804.3613318361.

The spelling of 520419491 in words is "five hundred twenty million, four hundred nineteen thousand, four hundred ninety-one".