2097840687 has 16 divisors (see below), whose sum is σ = 2845113600. Its totient is φ = 1374734592.

The previous prime is 2097840659. The next prime is 2097840697. The reversal of 2097840687 is 7860487902.

It is not a de Polignac number, because 2097840687 - 2⁶ = 2097840623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2097840617) 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, 28383 + ... + 70719.

It is an arithmetic number, because the mean of its divisors is an integer number (177819600).

Almost surely, 2^2097840687 is an apocalyptic number.

2097840687 is a deficient number, since it is larger than the sum of its proper divisors (747272913).

2097840687 is a wasteful number, since it uses less digits than its factorization.

2097840687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42622.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 2097840687 is about 45802.1908537135. The cubic root of 2097840687 is about 1280.1400983943.

The spelling of 2097840687 in words is "two billion, ninety-seven million, eight hundred forty thousand, six hundred eighty-seven".