890231 has 2 divisors, whose sum is σ = 890232. Its totient is φ = 890230.

The previous prime is 890221. The next prime is 890237. The reversal of 890231 is 132098.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890231 is a prime.

It is a super-2 number, since 2×890231² = 1585022466722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 890197 and 890206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445115 + 445116.

It is an arithmetic number, because the mean of its divisors is an integer number (445116).

2⁸⁹⁰²³¹ is an apocalyptic number.

890231 is a deficient number, since it is larger than the sum of its proper divisors (1).

890231 is an equidigital number, since it uses as much as digits as its factorization.

890231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 890231 is about 943.5205350177. The cubic root of 890231 is about 96.1983384985.

The spelling of 890231 in words is "eight hundred ninety thousand, two hundred thirty-one".