991483223 has 4 divisors (see below), whose sum is σ = 1003428888. Its totient is φ = 979537560.

The previous prime is 991483211. The next prime is 991483237. The reversal of 991483223 is 322384199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322384199 = 15329 ⋅21031.

It is a cyclic number.

It is not a de Polignac number, because 991483223 - 2²⁶ = 924374359 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 (991483123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5972708 + ... + 5972873.

It is an arithmetic number, because the mean of its divisors is an integer number (250857222).

Almost surely, 2^991483223 is an apocalyptic number.

991483223 is a deficient number, since it is larger than the sum of its proper divisors (11945665).

991483223 is a wasteful number, since it uses less digits than its factorization.

991483223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11945664.

The product of its digits is 93312, while the sum is 41.

The square root of 991483223 is about 31487.8265842532. The cubic root of 991483223 is about 997.1529764826.

The spelling of 991483223 in words is "nine hundred ninety-one million, four hundred eighty-three thousand, two hundred twenty-three".