2909399121 has 16 divisors (see below), whose sum is σ = 4319589120. Its totient is φ = 1935383760.

The previous prime is 2909399117. The next prime is 2909399137. The reversal of 2909399121 is 1219939092.

2909399121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2909399121 - 2² = 2909399117 is a prime.

It is a super-3 number, since 3×2909399121³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2909329121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104425 + ... + 129318.

It is an arithmetic number, because the mean of its divisors is an integer number (269974320).

Almost surely, 2^2909399121 is an apocalyptic number.

It is an amenable number.

2909399121 is a deficient number, since it is larger than the sum of its proper divisors (1410189999).

2909399121 is a wasteful number, since it uses less digits than its factorization.

2909399121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234213 (or 234207 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The square root of 2909399121 is about 53938.8461222522. The cubic root of 2909399121 is about 1427.5821238624.

The spelling of 2909399121 in words is "two billion, nine hundred nine million, three hundred ninety-nine thousand, one hundred twenty-one".