499809631 has 2 divisors, whose sum is σ = 499809632. Its totient is φ = 499809630.

The previous prime is 499809613. The next prime is 499809641. The reversal of 499809631 is 136908994.

Together with previous prime (499809613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 499809631 - 2¹⁷ = 499678559 is a prime.

It is a super-2 number, since 2×499809631² = 499619334480712322, 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 (499809641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249904815 + 249904816.

It is an arithmetic number, because the mean of its divisors is an integer number (249904816).

Almost surely, 2^499809631 is an apocalyptic number.

499809631 is a deficient number, since it is larger than the sum of its proper divisors (1).

499809631 is an equidigital number, since it uses as much as digits as its factorization.

499809631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 499809631 is about 22356.4225894932. The cubic root of 499809631 is about 793.5997825471.

The spelling of 499809631 in words is "four hundred ninety-nine million, eight hundred nine thousand, six hundred thirty-one".