131219939 has 2 divisors, whose sum is σ = 131219940. Its totient is φ = 131219938.

The previous prime is 131219903. The next prime is 131219987. The reversal of 131219939 is 939912131.

It is a weak prime.

It is an emirp because it is prime and its reverse (939912131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131219939 - 2²⁴ = 114442723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131219989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65609969 + 65609970.

It is an arithmetic number, because the mean of its divisors is an integer number (65609970).

Almost surely, 2^131219939 is an apocalyptic number.

131219939 is a deficient number, since it is larger than the sum of its proper divisors (1).

131219939 is an equidigital number, since it uses as much as digits as its factorization.

131219939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 38.

The square root of 131219939 is about 11455.1271926592. The cubic root of 131219939 is about 508.1593768534.

The spelling of 131219939 in words is "one hundred thirty-one million, two hundred nineteen thousand, nine hundred thirty-nine".