2491899 has 8 divisors (see below), whose sum is σ = 3332112. Its totient is φ = 1656480.

The previous prime is 2491891. The next prime is 2491903. The reversal of 2491899 is 9981942.

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

It is not a de Polignac number, because 2491899 - 2³ = 2491891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2491899.

It is not an unprimeable number, because it can be changed into a prime (2491891) 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, 277 + ... + 2249.

It is an arithmetic number, because the mean of its divisors is an integer number (416514).

2^2491899 is an apocalyptic number.

2491899 is a deficient number, since it is larger than the sum of its proper divisors (840213).

2491899 is a wasteful number, since it uses less digits than its factorization.

2491899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397.

The product of its digits is 46656, while the sum is 42.

The square root of 2491899 is about 1578.5749902998. The cubic root of 2491899 is about 135.5741255527.

The spelling of 2491899 in words is "two million, four hundred ninety-one thousand, eight hundred ninety-nine".