4618991 has 4 divisors (see below), whose sum is σ = 4974312. Its totient is φ = 4263672.

The previous prime is 4618987. The next prime is 4618993. The reversal of 4618991 is 1998164.

It is a happy number.

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 4618991 - 2² = 4618987 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4618993) 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, 177641 + ... + 177666.

It is an arithmetic number, because the mean of its divisors is an integer number (1243578).

Almost surely, 2^4618991 is an apocalyptic number.

4618991 is a deficient number, since it is larger than the sum of its proper divisors (355321).

4618991 is a wasteful number, since it uses less digits than its factorization.

4618991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355320.

The product of its digits is 15552, while the sum is 38.

The square root of 4618991 is about 2149.1837985617. The cubic root of 4618991 is about 166.5389051982.

The spelling of 4618991 in words is "four million, six hundred eighteen thousand, nine hundred ninety-one".