131169971 has 2 divisors, whose sum is σ = 131169972. Its totient is φ = 131169970.

The previous prime is 131169953. The next prime is 131169979. The reversal of 131169971 is 179961131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131169971 - 2¹⁴ = 131153587 is a prime.

It is a super-2 number, since 2×131169971² = 34411122584281682, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (131169979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65584985 + 65584986.

It is an arithmetic number, because the mean of its divisors is an integer number (65584986).

Almost surely, 2^131169971 is an apocalyptic number.

131169971 is a deficient number, since it is larger than the sum of its proper divisors (1).

131169971 is an equidigital number, since it uses as much as digits as its factorization.

131169971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 38.

The square root of 131169971 is about 11452.9459528979. The cubic root of 131169971 is about 508.0948670143.

The spelling of 131169971 in words is "one hundred thirty-one million, one hundred sixty-nine thousand, nine hundred seventy-one".