131118649 has 2 divisors, whose sum is σ = 131118650. Its totient is φ = 131118648.

The previous prime is 131118643. The next prime is 131118679. The reversal of 131118649 is 946811131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130942249 + 176400 = 11443^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 131118649 - 2⁷ = 131118521 is a prime.

It is not a weakly prime, because it can be changed into another prime (131118643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65559324 + 65559325.

It is an arithmetic number, because the mean of its divisors is an integer number (65559325).

Almost surely, 2^131118649 is an apocalyptic number.

It is an amenable number.

131118649 is a deficient number, since it is larger than the sum of its proper divisors (1).

131118649 is an equidigital number, since it uses as much as digits as its factorization.

131118649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 131118649 is about 11450.7051747916. The cubic root of 131118649 is about 508.0285920729.

The spelling of 131118649 in words is "one hundred thirty-one million, one hundred eighteen thousand, six hundred forty-nine".