4493991 has 4 divisors (see below), whose sum is σ = 5991992. Its totient is φ = 2995992.

The previous prime is 4493939. The next prime is 4494019. The reversal of 4493991 is 1993944.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4493991 - 2¹¹ = 4491943 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4493921) 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, 748996 + ... + 749001.

It is an arithmetic number, because the mean of its divisors is an integer number (1497998).

Almost surely, 2^4493991 is an apocalyptic number.

4493991 is a deficient number, since it is larger than the sum of its proper divisors (1498001).

4493991 is a wasteful number, since it uses less digits than its factorization.

4493991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498000.

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

The square root of 4493991 is about 2119.9035355412. The cubic root of 4493991 is about 165.0228434856.

The spelling of 4493991 in words is "four million, four hundred ninety-three thousand, nine hundred ninety-one".