131069981 has 16 divisors (see below), whose sum is σ = 153653760. Its totient is φ = 109472640.

The previous prime is 131069909. The next prime is 131069987. The reversal of 131069981 is 189960131.

It is a cyclic number.

It is not a de Polignac number, because 131069981 - 2¹⁰ = 131068957 is a prime.

It is a super-2 number, since 2×131069981² = 34358679838680722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131069987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87761 + ... + 89241.

It is an arithmetic number, because the mean of its divisors is an integer number (9603360).

Almost surely, 2^131069981 is an apocalyptic number.

It is an amenable number.

131069981 is a deficient number, since it is larger than the sum of its proper divisors (22583779).

131069981 is a wasteful number, since it uses less digits than its factorization.

131069981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 131069981 is about 11448.5798682631. The cubic root of 131069981 is about 507.9657284111.

The spelling of 131069981 in words is "one hundred thirty-one million, sixty-nine thousand, nine hundred eighty-one".