499138586 has 4 divisors (see below), whose sum is σ = 748707882. Its totient is φ = 249569292.

The previous prime is 499138579. The next prime is 499138589. The reversal of 499138586 is 685831994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 685831994 = 2 ⋅342915997.

It can be written as a sum of positive squares in only one way, i.e., 483780025 + 15358561 = 21995^2 + 3919^2 .

It is not an unprimeable number, because it can be changed into a prime (499138589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124784645 + ... + 124784648.

Almost surely, 2^499138586 is an apocalyptic number.

499138586 is a deficient number, since it is larger than the sum of its proper divisors (249569296).

499138586 is a wasteful number, since it uses less digits than its factorization.

499138586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249569295.

The product of its digits is 1866240, while the sum is 53.

The square root of 499138586 is about 22341.4096690428. The cubic root of 499138586 is about 793.2444608132.

The spelling of 499138586 in words is "four hundred ninety-nine million, one hundred thirty-eight thousand, five hundred eighty-six".