4547991 has 8 divisors (see below), whose sum is σ = 6930304. Its totient is φ = 2598840.

The previous prime is 4547957. The next prime is 4548001. The reversal of 4547991 is 1997454.

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

It is not a de Polignac number, because 4547991 - 2¹¹ = 4545943 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 (4547791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108265 + ... + 108306.

It is an arithmetic number, because the mean of its divisors is an integer number (866288).

Almost surely, 2^4547991 is an apocalyptic number.

4547991 is a deficient number, since it is larger than the sum of its proper divisors (2382313).

4547991 is a wasteful number, since it uses less digits than its factorization.

4547991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216581.

The product of its digits is 45360, while the sum is 39.

The square root of 4547991 is about 2132.6019319132. The cubic root of 4547991 is about 165.6811875818.

The spelling of 4547991 in words is "four million, five hundred forty-seven thousand, nine hundred ninety-one".