4608991 has 4 divisors (see below), whose sum is σ = 4624312. Its totient is φ = 4593672.

The previous prime is 4608983. The next prime is 4609009. The reversal of 4608991 is 1998064.

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 4608991 - 2³ = 4608983 is a prime.

It is a Duffinian number.

4608991 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4608991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4608911) 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, 7200 + ... + 7813.

It is an arithmetic number, because the mean of its divisors is an integer number (1156078).

Almost surely, 2^4608991 is an apocalyptic number.

4608991 is a deficient number, since it is larger than the sum of its proper divisors (15321).

4608991 is a wasteful number, since it uses less digits than its factorization.

4608991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15320.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 4608991 is about 2146.8560734246. The cubic root of 4608991 is about 166.4186341735.

The spelling of 4608991 in words is "four million, six hundred eight thousand, nine hundred ninety-one".