131913823 has 2 divisors, whose sum is σ = 131913824. Its totient is φ = 131913822.

The previous prime is 131913737. The next prime is 131913833. The reversal of 131913823 is 328319131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131913823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131913833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65956911 + 65956912.

It is an arithmetic number, because the mean of its divisors is an integer number (65956912).

Almost surely, 2^131913823 is an apocalyptic number.

131913823 is a deficient number, since it is larger than the sum of its proper divisors (1).

131913823 is an equidigital number, since it uses as much as digits as its factorization.

131913823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 131913823 is about 11485.3743082235. The cubic root of 131913823 is about 509.0535091698.

The spelling of 131913823 in words is "one hundred thirty-one million, nine hundred thirteen thousand, eight hundred twenty-three".