131945493 has 8 divisors (see below), whose sum is σ = 176090400. Its totient is φ = 87882128.

The previous prime is 131945479. The next prime is 131945521. The reversal of 131945493 is 394549131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131945493 - 2²⁵ = 98391061 is a prime.

It is a super-2 number, since 2×131945493² = 34819226246026098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131945413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16503 + ... + 23156.

It is an arithmetic number, because the mean of its divisors is an integer number (22011300).

Almost surely, 2^131945493 is an apocalyptic number.

It is an amenable number.

131945493 is a deficient number, since it is larger than the sum of its proper divisors (44144907).

131945493 is a wasteful number, since it uses less digits than its factorization.

131945493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40771.

The product of its digits is 58320, while the sum is 39.

The square root of 131945493 is about 11486.7529354470. The cubic root of 131945493 is about 509.0942439320.

The spelling of 131945493 in words is "one hundred thirty-one million, nine hundred forty-five thousand, four hundred ninety-three".