231449717 has 2 divisors, whose sum is σ = 231449718. Its totient is φ = 231449716.

The previous prime is 231449593. The next prime is 231449719. The reversal of 231449717 is 717944132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199346161 + 32103556 = 14119^2 + 5666^2 .

It is a cyclic number.

It is not a de Polignac number, because 231449717 - 2⁸ = 231449461 is a prime.

Together with 231449719, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231449719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115724858 + 115724859.

It is an arithmetic number, because the mean of its divisors is an integer number (115724859).

Almost surely, 2^231449717 is an apocalyptic number.

It is an amenable number.

231449717 is a deficient number, since it is larger than the sum of its proper divisors (1).

231449717 is an equidigital number, since it uses as much as digits as its factorization.

231449717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 231449717 is about 15213.4715630588. The cubic root of 231449717 is about 613.9771633646.

The spelling of 231449717 in words is "two hundred thirty-one million, four hundred forty-nine thousand, seven hundred seventeen".