2097809405 has 16 divisors (see below), whose sum is σ = 2542510080. Its totient is φ = 1661522688.

The previous prime is 2097809393. The next prime is 2097809423. The reversal of 2097809405 is 5049087902.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2097809405 - 2³⁰ = 1024067581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 721184 + ... + 724086.

It is an arithmetic number, because the mean of its divisors is an integer number (158906880).

Almost surely, 2^2097809405 is an apocalyptic number.

It is an amenable number.

2097809405 is a deficient number, since it is larger than the sum of its proper divisors (444700675).

2097809405 is a wasteful number, since it uses less digits than its factorization.

2097809405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 2097809405 is about 45801.8493622255. The cubic root of 2097809405 is about 1280.1337354164.

The spelling of 2097809405 in words is "two billion, ninety-seven million, eight hundred nine thousand, four hundred five".