132891731 has 4 divisors (see below), whose sum is σ = 151876272. Its totient is φ = 113907192.

The previous prime is 132891713. The next prime is 132891739. The reversal of 132891731 is 137198231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 132891731 - 2²² = 128697427 is a prime.

It is a super-2 number, since 2×132891731² = 35320424336352722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 132891691 and 132891700.

It is not an unprimeable number, because it can be changed into a prime (132891739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9492260 + ... + 9492273.

It is an arithmetic number, because the mean of its divisors is an integer number (37969068).

Almost surely, 2^132891731 is an apocalyptic number.

132891731 is a deficient number, since it is larger than the sum of its proper divisors (18984541).

132891731 is an equidigital number, since it uses as much as digits as its factorization.

132891731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18984540.

The product of its digits is 9072, while the sum is 35.

The square root of 132891731 is about 11527.8675825150. The cubic root of 132891731 is about 510.3083243917.

The spelling of 132891731 in words is "one hundred thirty-two million, eight hundred ninety-one thousand, seven hundred thirty-one".