131623413 has 4 divisors (see below), whose sum is σ = 175497888. Its totient is φ = 87748940.

The previous prime is 131623399. The next prime is 131623439. The reversal of 131623413 is 314326131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131623413 - 2⁴ = 131623397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131623493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21937233 + ... + 21937238.

It is an arithmetic number, because the mean of its divisors is an integer number (43874472).

Almost surely, 2^131623413 is an apocalyptic number.

It is an amenable number.

131623413 is a deficient number, since it is larger than the sum of its proper divisors (43874475).

131623413 is an equidigital number, since it uses as much as digits as its factorization.

131623413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43874474.

The product of its digits is 1296, while the sum is 24.

The square root of 131623413 is about 11472.7247417516. The cubic root of 131623413 is about 508.6796720555.

Adding to 131623413 its reverse (314326131), we get a palindrome (445949544).

The spelling of 131623413 in words is "one hundred thirty-one million, six hundred twenty-three thousand, four hundred thirteen".