2439198731 has 2 divisors, whose sum is σ = 2439198732. Its totient is φ = 2439198730.

The previous prime is 2439198659. The next prime is 2439198757. The reversal of 2439198731 is 1378919342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2439198731 is a prime.

It is a super-2 number, since 2×2439198731² = 11899380898624020722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2439198781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1219599365 + 1219599366.

It is an arithmetic number, because the mean of its divisors is an integer number (1219599366).

Almost surely, 2^2439198731 is an apocalyptic number.

2439198731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2439198731 is an equidigital number, since it uses as much as digits as its factorization.

2439198731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 2439198731 is about 49388.2448665672. The cubic root of 2439198731 is about 1346.1157173508.

The spelling of 2439198731 in words is "two billion, four hundred thirty-nine million, one hundred ninety-eight thousand, seven hundred thirty-one".