131506889 has 2 divisors, whose sum is σ = 131506890. Its totient is φ = 131506888.

The previous prime is 131506873. The next prime is 131506901. The reversal of 131506889 is 988605131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129777664 + 1729225 = 11392^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 131506889 - 2⁴ = 131506873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131506819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65753444 + 65753445.

It is an arithmetic number, because the mean of its divisors is an integer number (65753445).

Almost surely, 2^131506889 is an apocalyptic number.

It is an amenable number.

131506889 is a deficient number, since it is larger than the sum of its proper divisors (1).

131506889 is an equidigital number, since it uses as much as digits as its factorization.

131506889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 131506889 is about 11467.6453119200. The cubic root of 131506889 is about 508.5295192100.

The spelling of 131506889 in words is "one hundred thirty-one million, five hundred six thousand, eight hundred eighty-nine".