499640889 has 16 divisors (see below), whose sum is σ = 734247360. Its totient is φ = 299688960.

The previous prime is 499640873. The next prime is 499640893. The reversal of 499640889 is 988046994.

It is not a de Polignac number, because 499640889 - 2⁴ = 499640873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (499640819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74844 + ... + 81245.

It is an arithmetic number, because the mean of its divisors is an integer number (45890460).

Almost surely, 2^499640889 is an apocalyptic number.

It is an amenable number.

499640889 is a deficient number, since it is larger than the sum of its proper divisors (234606471).

499640889 is a wasteful number, since it uses less digits than its factorization.

499640889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156200.

The product of its (nonzero) digits is 4478976, while the sum is 57.

The square root of 499640889 is about 22352.6483665806. The cubic root of 499640889 is about 793.5104627479.

The spelling of 499640889 in words is "four hundred ninety-nine million, six hundred forty thousand, eight hundred eighty-nine".