131621339 has 2 divisors, whose sum is σ = 131621340. Its totient is φ = 131621338.

The previous prime is 131621309. The next prime is 131621353. The reversal of 131621339 is 933126131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131621339 - 2¹² = 131617243 is a prime.

It is not a weakly prime, because it can be changed into another prime (131621309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65810669 + 65810670.

It is an arithmetic number, because the mean of its divisors is an integer number (65810670).

Almost surely, 2^131621339 is an apocalyptic number.

131621339 is a deficient number, since it is larger than the sum of its proper divisors (1).

131621339 is an equidigital number, since it uses as much as digits as its factorization.

131621339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The square root of 131621339 is about 11472.6343531030. The cubic root of 131621339 is about 508.6770002735.

The spelling of 131621339 in words is "one hundred thirty-one million, six hundred twenty-one thousand, three hundred thirty-nine".