231449719 has 2 divisors, whose sum is σ = 231449720. Its totient is φ = 231449718.

The previous prime is 231449717. The next prime is 231449741. The reversal of 231449719 is 917944132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231449719 - 2¹ = 231449717 is a prime.

It is a super-2 number, since 2×231449719² = 107137944850357922, which contains 22 as substring.

Together with 231449717, 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 (231449717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115724859 + 115724860.

It is an arithmetic number, because the mean of its divisors is an integer number (115724860).

Almost surely, 2^231449719 is an apocalyptic number.

231449719 is a deficient number, since it is larger than the sum of its proper divisors (1).

231449719 is an equidigital number, since it uses as much as digits as its factorization.

231449719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 231449719 is about 15213.4716287901. The cubic root of 231449719 is about 613.9771651331.

The spelling of 231449719 in words is "two hundred thirty-one million, four hundred forty-nine thousand, seven hundred nineteen".