131165623 has 2 divisors, whose sum is σ = 131165624. Its totient is φ = 131165622.

The previous prime is 131165549. The next prime is 131165669. The reversal of 131165623 is 326561131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131165623 - 2²⁵ = 97611191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131165591 and 131165600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131165323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65582811 + 65582812.

It is an arithmetic number, because the mean of its divisors is an integer number (65582812).

Almost surely, 2^131165623 is an apocalyptic number.

131165623 is a deficient number, since it is larger than the sum of its proper divisors (1).

131165623 is an equidigital number, since it uses as much as digits as its factorization.

131165623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 131165623 is about 11452.7561311677. The cubic root of 131165623 is about 508.0892528714.

The spelling of 131165623 in words is "one hundred thirty-one million, one hundred sixty-five thousand, six hundred twenty-three".