231627493 has 2 divisors, whose sum is σ = 231627494. Its totient is φ = 231627492.

The previous prime is 231627481. The next prime is 231627521. The reversal of 231627493 is 394726132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228100609 + 3526884 = 15103^2 + 1878^2 .

It is a cyclic number.

It is not a de Polignac number, because 231627493 - 2⁹ = 231626981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231627593) 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, 115813746 + 115813747.

It is an arithmetic number, because the mean of its divisors is an integer number (115813747).

Almost surely, 2^231627493 is an apocalyptic number.

It is an amenable number.

231627493 is a deficient number, since it is larger than the sum of its proper divisors (1).

231627493 is an equidigital number, since it uses as much as digits as its factorization.

231627493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 231627493 is about 15219.3131579582. The cubic root of 231627493 is about 614.1343212871.

The spelling of 231627493 in words is "two hundred thirty-one million, six hundred twenty-seven thousand, four hundred ninety-three".