131356249 has 2 divisors, whose sum is σ = 131356250. Its totient is φ = 131356248.

The previous prime is 131356217. The next prime is 131356339. The reversal of 131356249 is 942653131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131331600 + 24649 = 11460^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 131356249 - 2⁵ = 131356217 is a prime.

It is not a weakly prime, because it can be changed into another prime (131356349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65678124 + 65678125.

It is an arithmetic number, because the mean of its divisors is an integer number (65678125).

Almost surely, 2^131356249 is an apocalyptic number.

It is an amenable number.

131356249 is a deficient number, since it is larger than the sum of its proper divisors (1).

131356249 is an equidigital number, since it uses as much as digits as its factorization.

131356249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 131356249 is about 11461.0753858440. The cubic root of 131356249 is about 508.3352729718.

The spelling of 131356249 in words is "one hundred thirty-one million, three hundred fifty-six thousand, two hundred forty-nine".