2999905 has 16 divisors (see below), whose sum is σ = 3946320. Its totient is φ = 2179072.

The previous prime is 2999903. The next prime is 2999911. The reversal of 2999905 is 5099992.

2999905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 81 + 2999824 = 9^2 + 1732^2 .

It is a cyclic number.

It is not a de Polignac number, because 2999905 - 2¹ = 2999903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2999903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1857 + ... + 3073.

It is an arithmetic number, because the mean of its divisors is an integer number (246645).

2^2999905 is an apocalyptic number.

It is an amenable number.

2999905 is a deficient number, since it is larger than the sum of its proper divisors (946415).

2999905 is a wasteful number, since it uses less digits than its factorization.

2999905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268.

The product of its (nonzero) digits is 65610, while the sum is 43.

The square root of 2999905 is about 1732.0233832140. The cubic root of 2999905 is about 144.2234346401.

The spelling of 2999905 in words is "two million, nine hundred ninety-nine thousand, nine hundred five".