231746939 has 2 divisors, whose sum is σ = 231746940. Its totient is φ = 231746938.

The previous prime is 231746929. The next prime is 231746951. The reversal of 231746939 is 939647132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231746939 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231746939.

It is not a weakly prime, because it can be changed into another prime (231746929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115873469 + 115873470.

It is an arithmetic number, because the mean of its divisors is an integer number (115873470).

Almost surely, 2^231746939 is an apocalyptic number.

231746939 is a deficient number, since it is larger than the sum of its proper divisors (1).

231746939 is an equidigital number, since it uses as much as digits as its factorization.

231746939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 231746939 is about 15223.2368108757. The cubic root of 231746939 is about 614.2398690373.

The spelling of 231746939 in words is "two hundred thirty-one million, seven hundred forty-six thousand, nine hundred thirty-nine".