231038947 has 2 divisors, whose sum is σ = 231038948. Its totient is φ = 231038946.

The previous prime is 231038861. The next prime is 231038963. The reversal of 231038947 is 749830132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231038947 is a prime.

It is equal to p_12696625 and since 231038947 and 12696625 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (231038987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115519473 + 115519474.

It is an arithmetic number, because the mean of its divisors is an integer number (115519474).

Almost surely, 2^231038947 is an apocalyptic number.

231038947 is a deficient number, since it is larger than the sum of its proper divisors (1).

231038947 is an equidigital number, since it uses as much as digits as its factorization.

231038947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 231038947 is about 15199.9653618026. The cubic root of 231038947 is about 613.6137255361.

The spelling of 231038947 in words is "two hundred thirty-one million, thirty-eight thousand, nine hundred forty-seven".