231947 has 2 divisors, whose sum is σ = 231948. Its totient is φ = 231946.

The previous prime is 231943. The next prime is 231961. The reversal of 231947 is 749132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231947 - 2² = 231943 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231947.

It is not a weakly prime, because it can be changed into another prime (231943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115973 + 115974.

It is an arithmetic number, because the mean of its divisors is an integer number (115974).

2²³¹⁹⁴⁷ is an apocalyptic number.

231947 is a deficient number, since it is larger than the sum of its proper divisors (1).

231947 is an equidigital number, since it uses as much as digits as its factorization.

231947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 231947 is about 481.6087623788. The cubic root of 231947 is about 61.4416570541.

The spelling of 231947 in words is "two hundred thirty-one thousand, nine hundred forty-seven".