131617243 has 2 divisors, whose sum is σ = 131617244. Its totient is φ = 131617242.

The previous prime is 131617231. The next prime is 131617267. The reversal of 131617243 is 342716131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131617243 is a prime.

It is not a weakly prime, because it can be changed into another prime (131617223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65808621 + 65808622.

It is an arithmetic number, because the mean of its divisors is an integer number (65808622).

Almost surely, 2^131617243 is an apocalyptic number.

131617243 is a deficient number, since it is larger than the sum of its proper divisors (1).

131617243 is an equidigital number, since it uses as much as digits as its factorization.

131617243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 131617243 is about 11472.4558399673. The cubic root of 131617243 is about 508.6717236149.

The spelling of 131617243 in words is "one hundred thirty-one million, six hundred seventeen thousand, two hundred forty-three".