4432991 has 4 divisors (see below), whose sum is σ = 4476984. Its totient is φ = 4389000.

The previous prime is 4432979. The next prime is 4433021. The reversal of 4432991 is 1992344.

It is a happy number.

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-4432991 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 (4432091) 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, 21845 + ... + 22046.

It is an arithmetic number, because the mean of its divisors is an integer number (1119246).

Almost surely, 2^4432991 is an apocalyptic number.

4432991 is a deficient number, since it is larger than the sum of its proper divisors (43993).

4432991 is a wasteful number, since it uses less digits than its factorization.

4432991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43992.

The product of its digits is 7776, while the sum is 32.

The square root of 4432991 is about 2105.4669315855. The cubic root of 4432991 is about 164.2727836794.

The spelling of 4432991 in words is "four million, four hundred thirty-two thousand, nine hundred ninety-one".