131089009 has 2 divisors, whose sum is σ = 131089010. Its totient is φ = 131089008.

The previous prime is 131088967. The next prime is 131089031. The reversal of 131089009 is 900980131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79923600 + 51165409 = 8940^2 + 7153^2 .

It is a cyclic number.

It is not a de Polignac number, because 131089009 - 2¹¹ = 131086961 is a prime.

It is not a weakly prime, because it can be changed into another prime (131089109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65544504 + 65544505.

It is an arithmetic number, because the mean of its divisors is an integer number (65544505).

Almost surely, 2^131089009 is an apocalyptic number.

It is an amenable number.

131089009 is a deficient number, since it is larger than the sum of its proper divisors (1).

131089009 is an equidigital number, since it uses as much as digits as its factorization.

131089009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 131089009 is about 11449.4108582058. The cubic root of 131089009 is about 507.9903084207.

The spelling of 131089009 in words is "one hundred thirty-one million, eighty-nine thousand, nine".