890531 has 2 divisors, whose sum is σ = 890532. Its totient is φ = 890530.

The previous prime is 890501. The next prime is 890543. The reversal of 890531 is 135098.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 890531 - 2⁶ = 890467 is a prime.

It is a super-2 number, since 2×890531² = 1586090923922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 890531.

It is not a weakly prime, because it can be changed into another prime (890501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445265 + 445266.

It is an arithmetic number, because the mean of its divisors is an integer number (445266).

2⁸⁹⁰⁵³¹ is an apocalyptic number.

890531 is a deficient number, since it is larger than the sum of its proper divisors (1).

890531 is an equidigital number, since it uses as much as digits as its factorization.

890531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 890531 is about 943.6795006781. The cubic root of 890531 is about 96.2091432823.

The spelling of 890531 in words is "eight hundred ninety thousand, five hundred thirty-one".