499998681 has 48 divisors (see below), whose sum is σ = 901170816. Its totient is φ = 260091648.

The previous prime is 499998641. The next prime is 499998683. The reversal of 499998681 is 186899994.

It is not a de Polignac number, because 499998681 - 2⁷ = 499998553 is a prime.

It is a super-2 number, since 2×499998681² = 499997362003479522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (499998683) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55606 + ... + 63968.

It is an arithmetic number, because the mean of its divisors is an integer number (18774392).

Almost surely, 2^499998681 is an apocalyptic number.

It is an amenable number.

499998681 is a deficient number, since it is larger than the sum of its proper divisors (401172135).

499998681 is a wasteful number, since it uses less digits than its factorization.

499998681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8462 (or 8459 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 499998681 is about 22360.6502812418. The cubic root of 499998681 is about 793.6998280562.

The spelling of 499998681 in words is "four hundred ninety-nine million, nine hundred ninety-eight thousand, six hundred eighty-one".