131903939 has 2 divisors, whose sum is σ = 131903940. Its totient is φ = 131903938.

The previous prime is 131903903. The next prime is 131903953. The reversal of 131903939 is 939309131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131903939 - 2¹⁶ = 131838403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131903539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65951969 + 65951970.

It is an arithmetic number, because the mean of its divisors is an integer number (65951970).

Almost surely, 2^131903939 is an apocalyptic number.

131903939 is a deficient number, since it is larger than the sum of its proper divisors (1).

131903939 is an equidigital number, since it uses as much as digits as its factorization.

131903939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 38.

The square root of 131903939 is about 11484.9440137948. The cubic root of 131903939 is about 509.0407947819.

The spelling of 131903939 in words is "one hundred thirty-one million, nine hundred three thousand, nine hundred thirty-nine".