131423297 has 4 divisors (see below), whose sum is σ = 134975316. Its totient is φ = 127871280.

The previous prime is 131423269. The next prime is 131423309. The reversal of 131423297 is 792324131.

It is a Cunningham number, because it is equal to 11464²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 792324131 = 313 ⋅2531387.

It can be written as a sum of positive squares in 2 ways, for example, as 117592336 + 13830961 = 10844^2 + 3719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131423297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131423197) 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, 1775954 + ... + 1776027.

It is an arithmetic number, because the mean of its divisors is an integer number (33743829).

Almost surely, 2^131423297 is an apocalyptic number.

It is an amenable number.

131423297 is a deficient number, since it is larger than the sum of its proper divisors (3552019).

131423297 is an equidigital number, since it uses as much as digits as its factorization.

131423297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552018.

The product of its digits is 9072, while the sum is 32.

The square root of 131423297 is about 11464.0000436148. Note that the first 4 decimals coincide. The cubic root of 131423297 is about 508.4217478986.

The spelling of 131423297 in words is "one hundred thirty-one million, four hundred twenty-three thousand, two hundred ninety-seven".