4590991 has 4 divisors (see below), whose sum is σ = 4595584. Its totient is φ = 4586400.

The previous prime is 4590977. The next prime is 4591001. The reversal of 4590991 is 1990954.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4590991 - 2⁵ = 4590959 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 4590991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4590941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90 + ... + 3031.

It is an arithmetic number, because the mean of its divisors is an integer number (1148896).

Almost surely, 2^4590991 is an apocalyptic number.

4590991 is a deficient number, since it is larger than the sum of its proper divisors (4593).

4590991 is a wasteful number, since it uses less digits than its factorization.

4590991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 4590991 is about 2142.6597956745. The cubic root of 4590991 is about 166.2017071935.

Subtracting from 4590991 its sum of digits (37), we obtain a palindrome (4590954).

The spelling of 4590991 in words is "four million, five hundred ninety thousand, nine hundred ninety-one".