991093 has 8 divisors (see below), whose sum is σ = 1060416. Its totient is φ = 924000.

The previous prime is 991091. The next prime is 991127. The reversal of 991093 is 390199.

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 991093 - 2¹ = 991091 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991091) 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, 418 + ... + 1468.

It is an arithmetic number, because the mean of its divisors is an integer number (132552).

2⁹⁹¹⁰⁹³ is an apocalyptic number.

It is an amenable number.

991093 is a deficient number, since it is larger than the sum of its proper divisors (69323).

991093 is a wasteful number, since it uses less digits than its factorization.

991093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115.

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

The square root of 991093 is about 995.5365387569. The cubic root of 991093 is about 99.7022141159.

The spelling of 991093 in words is "nine hundred ninety-one thousand, ninety-three".