2549399 has 4 divisors (see below), whose sum is σ = 2567880. Its totient is φ = 2530920.

The previous prime is 2549387. The next prime is 2549423. The reversal of 2549399 is 9939452.

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

It is a cyclic number.

It is not a de Polignac number, because 2549399 - 2⁴ = 2549383 is a prime.

It is a super-2 number, since 2×2549399² = 12998870522402, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9032 + ... + 9309.

It is an arithmetic number, because the mean of its divisors is an integer number (641970).

2^2549399 is an apocalyptic number.

2549399 is a deficient number, since it is larger than the sum of its proper divisors (18481).

2549399 is a wasteful number, since it uses less digits than its factorization.

2549399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18480.

The product of its digits is 87480, while the sum is 41.

The square root of 2549399 is about 1596.6837507785. The cubic root of 2549399 is about 136.6089868304.

The spelling of 2549399 in words is "two million, five hundred forty-nine thousand, three hundred ninety-nine".