1990093 has 8 divisors (see below), whose sum is σ = 2296512. Its totient is φ = 1689216.

The previous prime is 1990081. The next prime is 1990103. The reversal of 1990093 is 3900991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1990093 - 2¹³ = 1981901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580 + ... + 2077.

It is an arithmetic number, because the mean of its divisors is an integer number (287064).

2^1990093 is an apocalyptic number.

It is an amenable number.

1990093 is a deficient number, since it is larger than the sum of its proper divisors (306419).

1990093 is a wasteful number, since it uses less digits than its factorization.

1990093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 1990093 is about 1410.7065605575. The cubic root of 1990093 is about 125.7837265783.

The spelling of 1990093 in words is "one million, nine hundred ninety thousand, ninety-three".