231437047 has 2 divisors, whose sum is σ = 231437048. Its totient is φ = 231437046.

The previous prime is 231437039. The next prime is 231437093. The reversal of 231437047 is 740734132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231437047 - 2³ = 231437039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231437747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115718523 + 115718524.

It is an arithmetic number, because the mean of its divisors is an integer number (115718524).

Almost surely, 2^231437047 is an apocalyptic number.

231437047 is a deficient number, since it is larger than the sum of its proper divisors (1).

231437047 is an equidigital number, since it uses as much as digits as its factorization.

231437047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 231437047 is about 15213.0551501005. The cubic root of 231437047 is about 613.9659597322.

The spelling of 231437047 in words is "two hundred thirty-one million, four hundred thirty-seven thousand, forty-seven".