508413991 has 2 divisors, whose sum is σ = 508413992. Its totient is φ = 508413990.

The previous prime is 508413967. The next prime is 508414061. The reversal of 508413991 is 199314805.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 508413991 - 2⁵ = 508413959 is a prime.

It is equal to p_26775139 and since 508413991 and 26775139 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (508413491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254206995 + 254206996.

It is an arithmetic number, because the mean of its divisors is an integer number (254206996).

Almost surely, 2^508413991 is an apocalyptic number.

508413991 is a deficient number, since it is larger than the sum of its proper divisors (1).

508413991 is an equidigital number, since it uses as much as digits as its factorization.

508413991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 508413991 is about 22548.0374090518. The cubic root of 508413991 is about 798.1279094929.

The spelling of 508413991 in words is "five hundred eight million, four hundred thirteen thousand, nine hundred ninety-one".