1993231 has 2 divisors, whose sum is σ = 1993232. Its totient is φ = 1993230.

The previous prime is 1993219. The next prime is 1993237. The reversal of 1993231 is 1323991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1993231 - 2⁹ = 1992719 is a prime.

It is a super-2 number, since 2×1993231² = 7945939638722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1993231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1993237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996615 + 996616.

It is an arithmetic number, because the mean of its divisors is an integer number (996616).

2^1993231 is an apocalyptic number.

1993231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993231 is an equidigital number, since it uses as much as digits as its factorization.

1993231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 28.

The square root of 1993231 is about 1411.8183310894. The cubic root of 1993231 is about 125.8498042365.

The spelling of 1993231 in words is "one million, nine hundred ninety-three thousand, two hundred thirty-one".