131312723 has 4 divisors (see below), whose sum is σ = 132894888. Its totient is φ = 129730560.

The previous prime is 131312693. The next prime is 131312749. The reversal of 131312723 is 327213131.

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

It is a cyclic number.

It is not a de Polignac number, because 131312723 - 2⁶ = 131312659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131372723) 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, 790958 + ... + 791123.

It is an arithmetic number, because the mean of its divisors is an integer number (33223722).

Almost surely, 2^131312723 is an apocalyptic number.

131312723 is a deficient number, since it is larger than the sum of its proper divisors (1582165).

131312723 is an equidigital number, since it uses as much as digits as its factorization.

131312723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582164.

The product of its digits is 756, while the sum is 23.

The square root of 131312723 is about 11459.1763665632. The cubic root of 131312723 is about 508.2791197103.

Adding to 131312723 its reverse (327213131), we get a palindrome (458525854).

The spelling of 131312723 in words is "one hundred thirty-one million, three hundred twelve thousand, seven hundred twenty-three".