4577991 has 8 divisors (see below), whose sum is σ = 6658944. Its totient is φ = 2774520.

The previous prime is 4577977. The next prime is 4578017. The reversal of 4577991 is 1997754.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4577991 - 2⁵ = 4577959 is a prime.

It is a super-3 number, since 3×4577991³ (a number of 21 digits) contains 333 as substring.

4577991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4577191) 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 7 ways as a sum of consecutive naturals, for example, 69331 + ... + 69396.

It is an arithmetic number, because the mean of its divisors is an integer number (832368).

Almost surely, 2^4577991 is an apocalyptic number.

4577991 is a deficient number, since it is larger than the sum of its proper divisors (2080953).

4577991 is a wasteful number, since it uses less digits than its factorization.

4577991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138741.

The product of its digits is 79380, while the sum is 42.

The square root of 4577991 is about 2139.6240323945. The cubic root of 4577991 is about 166.0446848301.

It can be divided in two parts, 457 and 7991, that added together give a palindrome (8448).

The spelling of 4577991 in words is "four million, five hundred seventy-seven thousand, nine hundred ninety-one".