890099 has 4 divisors (see below), whose sum is σ = 1017264. Its totient is φ = 762936.

The previous prime is 890083. The next prime is 890107. The reversal of 890099 is 990098.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 890099 - 2⁴ = 890083 is a prime.

It is a Duffinian number.

890099 is a modest number, since divided by 99 gives 89 as remainder.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (890999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63572 + ... + 63585.

It is an arithmetic number, because the mean of its divisors is an integer number (254316).

2⁸⁹⁰⁰⁹⁹ is an apocalyptic number.

890099 is a deficient number, since it is larger than the sum of its proper divisors (127165).

890099 is a wasteful number, since it uses less digits than its factorization.

890099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127164.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 890099 is about 943.4505816417. The cubic root of 890099 is about 96.1935836247.

Subtracting 890099 from its reverse (990098), we obtain a palindrome (99999).

The spelling of 890099 in words is "eight hundred ninety thousand, ninety-nine".