499745691 has 6 divisors (see below), whose sum is σ = 721854900. Its totient is φ = 333163788.

The previous prime is 499745683. The next prime is 499745713. The reversal of 499745691 is 196547994.

It is a happy number.

499745691 is a `hidden beast` number, since 4 + 9 + 9 + 74 + 569 + 1 = 666.

It is not a de Polignac number, because 499745691 - 2³ = 499745683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (499745621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27763641 + ... + 27763658.

It is an arithmetic number, because the mean of its divisors is an integer number (120309150).

Almost surely, 2^499745691 is an apocalyptic number.

499745691 is a deficient number, since it is larger than the sum of its proper divisors (222109209).

499745691 is a wasteful number, since it uses less digits than its factorization.

499745691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55527305 (or 55527302 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 499745691 is about 22354.9925296342. The cubic root of 499745691 is about 793.5659397058.

The spelling of 499745691 in words is "four hundred ninety-nine million, seven hundred forty-five thousand, six hundred ninety-one".