2108137897 has 4 divisors (see below), whose sum is σ = 2124737536. Its totient is φ = 2091538260.

The previous prime is 2108137849. The next prime is 2108137901. The reversal of 2108137897 is 7987318012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2108137897 - 2⁷ = 2108137769 is a prime.

It is a super-3 number, since 3×2108137897³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2108137807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8299629 + ... + 8299882.

It is an arithmetic number, because the mean of its divisors is an integer number (531184384).

Almost surely, 2^2108137897 is an apocalyptic number.

It is an amenable number.

2108137897 is a deficient number, since it is larger than the sum of its proper divisors (16599639).

2108137897 is a wasteful number, since it uses less digits than its factorization.

2108137897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16599638.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 2108137897 is about 45914.4628303544. The cubic root of 2108137897 is about 1282.2311949637.

The spelling of 2108137897 in words is "two billion, one hundred eight million, one hundred thirty-seven thousand, eight hundred ninety-seven".