2149999 has 6 divisors (see below), whose sum is σ = 2205440. Its totient is φ = 2095920.

The previous prime is 2149993. The next prime is 2150009. The reversal of 2149999 is 9999412.

It is not a de Polignac number, because 2149999 - 2³ = 2149991 is a prime.

It is a Duffinian number.

2149999 is a modest number, since divided by 9999 gives 214 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1042 + ... + 2320.

2^2149999 is an apocalyptic number.

2149999 is a deficient number, since it is larger than the sum of its proper divisors (55441).

2149999 is an equidigital number, since it uses as much as digits as its factorization.

2149999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361 (or 1320 counting only the distinct ones).

The product of its digits is 52488, while the sum is 43.

The square root of 2149999 is about 1466.2874888643. The cubic root of 2149999 is about 129.0662680571.

The spelling of 2149999 in words is "two million, one hundred forty-nine thousand, nine hundred ninety-nine".