4491993 has 16 divisors (see below), whose sum is σ = 6746112. Its totient is φ = 2634000.

The previous prime is 4491989. The next prime is 4491997. The reversal of 4491993 is 3991944.

It is an interprime number because it is at equal distance from previous prime (4491989) and next prime (4491997).

It is not a de Polignac number, because 4491993 - 2² = 4491989 is a prime.

It is a super-2 number, since 2×4491993² = 40356002224098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4491997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1173 + ... + 3218.

It is an arithmetic number, because the mean of its divisors is an integer number (421632).

Almost surely, 2^4491993 is an apocalyptic number.

It is an amenable number.

4491993 is a deficient number, since it is larger than the sum of its proper divisors (2254119).

4491993 is a wasteful number, since it uses less digits than its factorization.

4491993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436.

The product of its digits is 34992, while the sum is 39.

The square root of 4491993 is about 2119.4322352932. The cubic root of 4491993 is about 164.9983838226.

It can be divided in two parts, 449 and 1993, that added together give a palindrome (2442).

The spelling of 4491993 in words is "four million, four hundred ninety-one thousand, nine hundred ninety-three".