131662889 has 2 divisors, whose sum is σ = 131662890. Its totient is φ = 131662888.

The previous prime is 131662829. The next prime is 131662907. The reversal of 131662889 is 988266131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113955625 + 17707264 = 10675^2 + 4208^2 .

It is an emirp because it is prime and its reverse (988266131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131662889 - 2¹⁶ = 131597353 is a prime.

It is not a weakly prime, because it can be changed into another prime (131662819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65831444 + 65831445.

It is an arithmetic number, because the mean of its divisors is an integer number (65831445).

Almost surely, 2^131662889 is an apocalyptic number.

It is an amenable number.

131662889 is a deficient number, since it is larger than the sum of its proper divisors (1).

131662889 is an equidigital number, since it uses as much as digits as its factorization.

131662889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 44.

The square root of 131662889 is about 11474.4450410466. The cubic root of 131662889 is about 508.7305207384.

The spelling of 131662889 in words is "one hundred thirty-one million, six hundred sixty-two thousand, eight hundred eighty-nine".