991092083 has 4 divisors (see below), whose sum is σ = 991510368. Its totient is φ = 990673800.

The previous prime is 991092043. The next prime is 991092097. The reversal of 991092083 is 380290199.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-991092083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 991092083.

It is not an unprimeable number, because it can be changed into a prime (991092043) 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, 205568 + ... + 210333.

It is an arithmetic number, because the mean of its divisors is an integer number (247877592).

Almost surely, 2^991092083 is an apocalyptic number.

991092083 is a deficient number, since it is larger than the sum of its proper divisors (418285).

991092083 is a wasteful number, since it uses less digits than its factorization.

991092083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418284.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 991092083 is about 31481.6149998694. The cubic root of 991092083 is about 997.0218336635.

The spelling of 991092083 in words is "nine hundred ninety-one million, ninety-two thousand, eighty-three".