890551 has 2 divisors, whose sum is σ = 890552. Its totient is φ = 890550.

The previous prime is 890543. The next prime is 890563. The reversal of 890551 is 155098.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 890551 - 2³ = 890543 is a prime.

It is a congruent number.

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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445275 + 445276.

It is an arithmetic number, because the mean of its divisors is an integer number (445276).

2⁸⁹⁰⁵⁵¹ is an apocalyptic number.

890551 is a deficient number, since it is larger than the sum of its proper divisors (1).

890551 is an equidigital number, since it uses as much as digits as its factorization.

890551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 890551 is about 943.6900974367. The cubic root of 890551 is about 96.2098635149.

It can be divided in two parts, 890 and 551, that added together give a palindrome (1441).

The spelling of 890551 in words is "eight hundred ninety thousand, five hundred fifty-one".