990093 has 16 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 596544.

The previous prime is 990053. The next prime is 990137. The reversal of 990093 is 390099.

It is not a de Polignac number, because 990093 - 2⁸ = 989837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 990093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1828 + ... + 2306.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2⁹⁹⁰⁰⁹³ is an apocalyptic number.

It is an amenable number.

990093 is a deficient number, since it is larger than the sum of its proper divisors (461427).

990093 is a wasteful number, since it uses less digits than its factorization.

990093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548.

The product of its (nonzero) digits is 2187, while the sum is 30.

The square root of 990093 is about 995.0341702675. The cubic root of 990093 is about 99.6686700840.

The spelling of 990093 in words is "nine hundred ninety thousand, ninety-three".