131323939 has 2 divisors, whose sum is σ = 131323940. Its totient is φ = 131323938.

The previous prime is 131323921. The next prime is 131323961. The reversal of 131323939 is 939323131.

It is a weak prime.

It is an emirp because it is prime and its reverse (939323131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131323939 - 2⁷ = 131323811 is a prime.

It is not a weakly prime, because it can be changed into another prime (131323979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65661969 + 65661970.

It is an arithmetic number, because the mean of its divisors is an integer number (65661970).

Almost surely, 2^131323939 is an apocalyptic number.

131323939 is a deficient number, since it is larger than the sum of its proper divisors (1).

131323939 is an equidigital number, since it uses as much as digits as its factorization.

131323939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 34.

The square root of 131323939 is about 11459.6657455617. The cubic root of 131323939 is about 508.2935907536.

It can be divided in two parts, 13132 and 3939, that added together give a palindrome (17071).

The spelling of 131323939 in words is "one hundred thirty-one million, three hundred twenty-three thousand, nine hundred thirty-nine".