131669771 has 2 divisors, whose sum is σ = 131669772. Its totient is φ = 131669770.

The previous prime is 131669767. The next prime is 131669801. The reversal of 131669771 is 177966131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131669771 - 2² = 131669767 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131669731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65834885 + 65834886.

It is an arithmetic number, because the mean of its divisors is an integer number (65834886).

Almost surely, 2^131669771 is an apocalyptic number.

131669771 is a deficient number, since it is larger than the sum of its proper divisors (1).

131669771 is an equidigital number, since it uses as much as digits as its factorization.

131669771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 131669771 is about 11474.7449209122. The cubic root of 131669771 is about 508.7393843406.

The spelling of 131669771 in words is "one hundred thirty-one million, six hundred sixty-nine thousand, seven hundred seventy-one".