2131992539 has 2 divisors, whose sum is σ = 2131992540. Its totient is φ = 2131992538.

The previous prime is 2131992529. The next prime is 2131992617. The reversal of 2131992539 is 9352991312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131992539 - 2⁴ = 2131992523 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2131992539.

It is not a weakly prime, because it can be changed into another prime (2131992529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065996269 + 1065996270.

It is an arithmetic number, because the mean of its divisors is an integer number (1065996270).

Almost surely, 2^2131992539 is an apocalyptic number.

2131992539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131992539 is an equidigital number, since it uses as much as digits as its factorization.

2131992539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 44.

The square root of 2131992539 is about 46173.5047294441. The cubic root of 2131992539 is about 1287.0494307259.

The spelling of 2131992539 in words is "two billion, one hundred thirty-one million, nine hundred ninety-two thousand, five hundred thirty-nine".