131149649 has 2 divisors, whose sum is σ = 131149650. Its totient is φ = 131149648.

The previous prime is 131149643. The next prime is 131149661. The reversal of 131149649 is 946941131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129231424 + 1918225 = 11368^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 131149649 - 2⁸ = 131149393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131149643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65574824 + 65574825.

It is an arithmetic number, because the mean of its divisors is an integer number (65574825).

Almost surely, 2^131149649 is an apocalyptic number.

It is an amenable number.

131149649 is a deficient number, since it is larger than the sum of its proper divisors (1).

131149649 is an equidigital number, since it uses as much as digits as its factorization.

131149649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 131149649 is about 11452.0587232165. The cubic root of 131149649 is about 508.0686261578.

The spelling of 131149649 in words is "one hundred thirty-one million, one hundred forty-nine thousand, six hundred forty-nine".