3129923491 has 2 divisors, whose sum is σ = 3129923492. Its totient is φ = 3129923490.

The previous prime is 3129923483. The next prime is 3129923497. The reversal of 3129923491 is 1943299213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3129923491 - 2³ = 3129923483 is a prime.

It is not a weakly prime, because it can be changed into another prime (3129923497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564961745 + 1564961746.

It is an arithmetic number, because the mean of its divisors is an integer number (1564961746).

Almost surely, 2^3129923491 is an apocalyptic number.

3129923491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3129923491 is an equidigital number, since it uses as much as digits as its factorization.

3129923491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 43.

The square root of 3129923491 is about 55945.7191481171. The cubic root of 3129923491 is about 1462.7762728958.

The spelling of 3129923491 in words is "three billion, one hundred twenty-nine million, nine hundred twenty-three thousand, four hundred ninety-one".