2199749 has 8 divisors (see below), whose sum is σ = 2358720. Its totient is φ = 2044096.

The previous prime is 2199739. The next prime is 2199781. The reversal of 2199749 is 9479912.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2199749 - 2¹² = 2195653 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 (2199719) 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, 632 + ... + 2190.

It is an arithmetic number, because the mean of its divisors is an integer number (294840).

2^2199749 is an apocalyptic number.

It is an amenable number.

2199749 is a deficient number, since it is larger than the sum of its proper divisors (158971).

2199749 is a wasteful number, since it uses less digits than its factorization.

2199749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659.

The product of its digits is 40824, while the sum is 41.

The square root of 2199749 is about 1483.1550829229. The cubic root of 2199749 is about 130.0541983083.

The spelling of 2199749 in words is "two million, one hundred ninety-nine thousand, seven hundred forty-nine".