490779839 has 4 divisors (see below), whose sum is σ = 535396200. Its totient is φ = 446163480.

The previous prime is 490779833. The next prime is 490779853. The reversal of 490779839 is 938977094.

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 490779839 - 2¹² = 490775743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490779833) 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, 22308164 + ... + 22308185.

It is an arithmetic number, because the mean of its divisors is an integer number (133849050).

Almost surely, 2^490779839 is an apocalyptic number.

490779839 is a deficient number, since it is larger than the sum of its proper divisors (44616361).

490779839 is a wasteful number, since it uses less digits than its factorization.

490779839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44616360.

The product of its (nonzero) digits is 3429216, while the sum is 56.

The square root of 490779839 is about 22153.5513857259. The cubic root of 490779839 is about 788.7915289277.

The spelling of 490779839 in words is "four hundred ninety million, seven hundred seventy-nine thousand, eight hundred thirty-nine".