131949499 has 16 divisors (see below), whose sum is σ = 149111424. Its totient is φ = 115718400.

The previous prime is 131949497. The next prime is 131949533. The reversal of 131949499 is 994949131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 131949499 - 2¹ = 131949497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131949491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37579 + ... + 40939.

It is an arithmetic number, because the mean of its divisors is an integer number (9319464).

Almost surely, 2^131949499 is an apocalyptic number.

131949499 is a deficient number, since it is larger than the sum of its proper divisors (17161925).

131949499 is a wasteful number, since it uses less digits than its factorization.

131949499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498.

The product of its digits is 314928, while the sum is 49.

The square root of 131949499 is about 11486.9273089021. The cubic root of 131949499 is about 509.0993960871.

The spelling of 131949499 in words is "one hundred thirty-one million, nine hundred forty-nine thousand, four hundred ninety-nine".