990232111 has 4 divisors (see below), whose sum is σ = 1080253224. Its totient is φ = 900211000.

The previous prime is 990232109. The next prime is 990232129. The reversal of 990232111 is 111232099.

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

It is a cyclic number.

It is not a de Polignac number, because 990232111 - 2¹ = 990232109 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 990232111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990232151) 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, 45010540 + ... + 45010561.

It is an arithmetic number, because the mean of its divisors is an integer number (270063306).

Almost surely, 2^990232111 is an apocalyptic number.

990232111 is a deficient number, since it is larger than the sum of its proper divisors (90021113).

990232111 is a wasteful number, since it uses less digits than its factorization.

990232111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90021112.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 990232111 is about 31467.9537148509. The cubic root of 990232111 is about 996.7333777986.

The spelling of 990232111 in words is "nine hundred ninety million, two hundred thirty-two thousand, one hundred eleven".