131203139 has 2 divisors, whose sum is σ = 131203140. Its totient is φ = 131203138.

The previous prime is 131203117. The next prime is 131203159. The reversal of 131203139 is 931302131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131203139 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131203159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65601569 + 65601570.

It is an arithmetic number, because the mean of its divisors is an integer number (65601570).

Almost surely, 2^131203139 is an apocalyptic number.

131203139 is a deficient number, since it is larger than the sum of its proper divisors (1).

131203139 is an equidigital number, since it uses as much as digits as its factorization.

131203139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 131203139 is about 11454.3938730952. The cubic root of 131203139 is about 508.1376894941.

The spelling of 131203139 in words is "one hundred thirty-one million, two hundred three thousand, one hundred thirty-nine".