131660361 has 12 divisors (see below), whose sum is σ = 217344192. Its totient is φ = 75234456.

The previous prime is 131660351. The next prime is 131660363. The reversal of 131660361 is 163066131.

It is a happy number.

It is not a de Polignac number, because 131660361 - 2¹⁴ = 131643977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131660363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1044861 + ... + 1044986.

It is an arithmetic number, because the mean of its divisors is an integer number (18112016).

Almost surely, 2^131660361 is an apocalyptic number.

It is an amenable number.

131660361 is a deficient number, since it is larger than the sum of its proper divisors (85683831).

131660361 is a wasteful number, since it uses less digits than its factorization.

131660361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089860 (or 2089857 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 131660361 is about 11474.3348826849. The cubic root of 131660361 is about 508.7272647488.

The spelling of 131660361 in words is "one hundred thirty-one million, six hundred sixty thousand, three hundred sixty-one".