2105957897 has 8 divisors (see below), whose sum is σ = 2173752000. Its totient is φ = 2038736304.

The previous prime is 2105957863. The next prime is 2105957899. The reversal of 2105957897 is 7987595012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2105957897 - 2²² = 2101763593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105957899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135647 + ... + 150372.

It is an arithmetic number, because the mean of its divisors is an integer number (271719000).

Almost surely, 2^2105957897 is an apocalyptic number.

It is an amenable number.

2105957897 is a deficient number, since it is larger than the sum of its proper divisors (67794103).

2105957897 is a wasteful number, since it uses less digits than its factorization.

2105957897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286255.

The product of its (nonzero) digits is 1587600, while the sum is 53.

The square root of 2105957897 is about 45890.7168935069. The cubic root of 2105957897 is about 1281.7890625841.

The spelling of 2105957897 in words is "two billion, one hundred five million, nine hundred fifty-seven thousand, eight hundred ninety-seven".