4569991 has 4 divisors (see below), whose sum is σ = 4838832. Its totient is φ = 4301152.

The previous prime is 4569977. The next prime is 4570001. The reversal of 4569991 is 1999654.

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 4569991 - 2⁵ = 4569959 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 (4569931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134395 + ... + 134428.

It is an arithmetic number, because the mean of its divisors is an integer number (1209708).

Almost surely, 2^4569991 is an apocalyptic number.

4569991 is a deficient number, since it is larger than the sum of its proper divisors (268841).

4569991 is a wasteful number, since it uses less digits than its factorization.

4569991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268840.

The product of its digits is 87480, while the sum is 43.

The square root of 4569991 is about 2137.7537276309. The cubic root of 4569991 is about 165.9479078818.

The spelling of 4569991 in words is "four million, five hundred sixty-nine thousand, nine hundred ninety-one".