499999931 has 2 divisors, whose sum is σ = 499999932. Its totient is φ = 499999930.

The previous prime is 499999909. The next prime is 499999993. The reversal of 499999931 is 139999994.

It is an a-pointer prime, because the next prime (499999993) can be obtained adding 499999931 to its sum of digits (62).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499999931 is a prime.

It is a super-2 number, since 2×499999931² = 499999862000009522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (499999831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249999965 + 249999966.

It is an arithmetic number, because the mean of its divisors is an integer number (249999966).

Almost surely, 2^499999931 is an apocalyptic number.

499999931 is a deficient number, since it is larger than the sum of its proper divisors (1).

499999931 is an equidigital number, since it uses as much as digits as its factorization.

499999931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6377292, while the sum is 62.

The square root of 499999931 is about 22360.6782321109. The cubic root of 499999931 is about 793.7004894739.

It can be divided in two parts, 49999993 and 1, that added together give a palindrome (49999994).

The spelling of 499999931 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred thirty-one".