2938909 has 4 divisors (see below), whose sum is σ = 3111804. Its totient is φ = 2766016.

The previous prime is 2938861. The next prime is 2938927. The reversal of 2938909 is 9098392.

It is a happy number.

2938909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1368900 + 1570009 = 1170^2 + 1253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2938909 is a prime.

It is a super-2 number, since 2×2938909² = 17274372220562, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2938009) 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 3 ways as a sum of consecutive naturals, for example, 86422 + ... + 86455.

It is an arithmetic number, because the mean of its divisors is an integer number (777951).

2^2938909 is an apocalyptic number.

It is an amenable number.

2938909 is a deficient number, since it is larger than the sum of its proper divisors (172895).

2938909 is a wasteful number, since it uses less digits than its factorization.

2938909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172894.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 2938909 is about 1714.3246483674. The cubic root of 2938909 is about 143.2392526052.

The spelling of 2938909 in words is "two million, nine hundred thirty-eight thousand, nine hundred nine".