4990239889 has 2 divisors, whose sum is σ = 4990239890. Its totient is φ = 4990239888.

The previous prime is 4990239833. The next prime is 4990239949. The reversal of 4990239889 is 9889320994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2728286289 + 2261953600 = 52233^2 + 47560^2 .

It is a cyclic number.

It is not a de Polignac number, because 4990239889 - 2²⁵ = 4956685457 is a prime.

It is not a weakly prime, because it can be changed into another prime (4990239589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2495119944 + 2495119945.

It is an arithmetic number, because the mean of its divisors is an integer number (2495119945).

Almost surely, 2^4990239889 is an apocalyptic number.

It is an amenable number.

4990239889 is a deficient number, since it is larger than the sum of its proper divisors (1).

4990239889 is an equidigital number, since it uses as much as digits as its factorization.

4990239889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 61.

The square root of 4990239889 is about 70641.6299995973. The cubic root of 4990239889 is about 1708.8625849234.

The spelling of 4990239889 in words is "four billion, nine hundred ninety million, two hundred thirty-nine thousand, eight hundred eighty-nine".