131899489 has 2 divisors, whose sum is σ = 131899490. Its totient is φ = 131899488.

The previous prime is 131899477. The next prime is 131899499. The reversal of 131899489 is 984998131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99500625 + 32398864 = 9975^2 + 5692^2 .

It is a cyclic number.

It is not a de Polignac number, because 131899489 - 2¹³ = 131891297 is a prime.

It is a super-2 number, since 2×131899489² = 34794950396922242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131899409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65949744 + 65949745.

It is an arithmetic number, because the mean of its divisors is an integer number (65949745).

Almost surely, 2^131899489 is an apocalyptic number.

It is an amenable number.

131899489 is a deficient number, since it is larger than the sum of its proper divisors (1).

131899489 is an equidigital number, since it uses as much as digits as its factorization.

131899489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 52.

The square root of 131899489 is about 11484.7502802630. The cubic root of 131899489 is about 509.0350702700.

The spelling of 131899489 in words is "one hundred thirty-one million, eight hundred ninety-nine thousand, four hundred eighty-nine".