499649131 has 2 divisors, whose sum is σ = 499649132. Its totient is φ = 499649130.

The previous prime is 499649123. The next prime is 499649141. The reversal of 499649131 is 131946994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 499649131 - 2³ = 499649123 is a prime.

It is a super-2 number, since 2×499649131² = 499298508218110322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (499649141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249824565 + 249824566.

It is an arithmetic number, because the mean of its divisors is an integer number (249824566).

Almost surely, 2^499649131 is an apocalyptic number.

499649131 is a deficient number, since it is larger than the sum of its proper divisors (1).

499649131 is an equidigital number, since it uses as much as digits as its factorization.

499649131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 46.

The square root of 499649131 is about 22352.8327287617. The cubic root of 499649131 is about 793.5148259332.

It can be divided in two parts, 49964 and 9131, that added together give a palindrome (59095).

The spelling of 499649131 in words is "four hundred ninety-nine million, six hundred forty-nine thousand, one hundred thirty-one".