231747947 has 2 divisors, whose sum is σ = 231747948. Its totient is φ = 231747946.

The previous prime is 231747937. The next prime is 231747979. The reversal of 231747947 is 749747132.

231747947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231747947 - 2¹² = 231743851 is a prime.

It is a super-2 number, since 2×231747947² = 107414221877429618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231747898 and 231747907.

It is not a weakly prime, because it can be changed into another prime (231747937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115873973 + 115873974.

It is an arithmetic number, because the mean of its divisors is an integer number (115873974).

Almost surely, 2^231747947 is an apocalyptic number.

231747947 is a deficient number, since it is larger than the sum of its proper divisors (1).

231747947 is an equidigital number, since it uses as much as digits as its factorization.

231747947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 44.

The square root of 231747947 is about 15223.2699181221. The cubic root of 231747947 is about 614.2407595962.

The spelling of 231747947 in words is "two hundred thirty-one million, seven hundred forty-seven thousand, nine hundred forty-seven".