131109576989 has 2 divisors, whose sum is σ = 131109576990. Its totient is φ = 131109576988.

The previous prime is 131109576973. The next prime is 131109577057. The reversal of 131109576989 is 989675901131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125995181764 + 5114395225 = 354958^2 + 71515^2 .

It is a cyclic number.

It is not a de Polignac number, because 131109576989 - 2⁴ = 131109576973 is a prime.

It is a super-2 number, since 2×131109576989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131109570989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65554788494 + 65554788495.

It is an arithmetic number, because the mean of its divisors is an integer number (65554788495).

Almost surely, 2^131109576989 is an apocalyptic number.

It is an amenable number.

131109576989 is a deficient number, since it is larger than the sum of its proper divisors (1).

131109576989 is an equidigital number, since it uses as much as digits as its factorization.

131109576989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3674160, while the sum is 59.

The spelling of 131109576989 in words is "one hundred thirty-one billion, one hundred nine million, five hundred seventy-six thousand, nine hundred eighty-nine".