131439783491 has 2 divisors, whose sum is σ = 131439783492. Its totient is φ = 131439783490.

The previous prime is 131439783451. The next prime is 131439783511. The reversal of 131439783491 is 194387934131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131439783491 - 2⁶ = 131439783427 is a prime.

It is a super-2 number, since 2×131439783491² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131439783451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65719891745 + 65719891746.

It is an arithmetic number, because the mean of its divisors is an integer number (65719891746).

Almost surely, 2^131439783491 is an apocalyptic number.

131439783491 is a deficient number, since it is larger than the sum of its proper divisors (1).

131439783491 is an equidigital number, since it uses as much as digits as its factorization.

131439783491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The spelling of 131439783491 in words is "one hundred thirty-one billion, four hundred thirty-nine million, seven hundred eighty-three thousand, four hundred ninety-one".