231206947 has 2 divisors, whose sum is σ = 231206948. Its totient is φ = 231206946.

The previous prime is 231206923. The next prime is 231206951. The reversal of 231206947 is 749602132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231206947 - 2⁷ = 231206819 is a prime.

It is not a weakly prime, because it can be changed into another prime (231206917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115603473 + 115603474.

It is an arithmetic number, because the mean of its divisors is an integer number (115603474).

Almost surely, 2^231206947 is an apocalyptic number.

231206947 is a deficient number, since it is larger than the sum of its proper divisors (1).

231206947 is an equidigital number, since it uses as much as digits as its factorization.

231206947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 231206947 is about 15205.4906859332. The cubic root of 231206947 is about 613.7624192674.

The spelling of 231206947 in words is "two hundred thirty-one million, two hundred six thousand, nine hundred forty-seven".