499180639 has 4 divisors (see below), whose sum is σ = 528544224. Its totient is φ = 469817056.

The previous prime is 499180637. The next prime is 499180681. The reversal of 499180639 is 936081994.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 499180639 - 2¹ = 499180637 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 499180592 and 499180601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499180637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14681767 + ... + 14681800.

It is an arithmetic number, because the mean of its divisors is an integer number (132136056).

Almost surely, 2^499180639 is an apocalyptic number.

499180639 is a deficient number, since it is larger than the sum of its proper divisors (29363585).

499180639 is a wasteful number, since it uses less digits than its factorization.

499180639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29363584.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 499180639 is about 22342.3507939518. The cubic root of 499180639 is about 793.2667374403.

The spelling of 499180639 in words is "four hundred ninety-nine million, one hundred eighty thousand, six hundred thirty-nine".