131241391 has 2 divisors, whose sum is σ = 131241392. Its totient is φ = 131241390.

The previous prime is 131241373. The next prime is 131241401. The reversal of 131241391 is 193142131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131241391 - 2⁷ = 131241263 is a prime.

It is a super-2 number, since 2×131241391² = 34448605423229762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131241361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65620695 + 65620696.

It is an arithmetic number, because the mean of its divisors is an integer number (65620696).

Almost surely, 2^131241391 is an apocalyptic number.

131241391 is a deficient number, since it is larger than the sum of its proper divisors (1).

131241391 is an equidigital number, since it uses as much as digits as its factorization.

131241391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 131241391 is about 11456.0635036648. The cubic root of 131241391 is about 508.1870668550.

The spelling of 131241391 in words is "one hundred thirty-one million, two hundred forty-one thousand, three hundred ninety-one".