2100900647 has 4 divisors (see below), whose sum is σ = 2224483056. Its totient is φ = 1977318240.

The previous prime is 2100900619. The next prime is 2100900649. The reversal of 2100900647 is 7460090012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2100900647 - 2⁶ = 2100900583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100900649) 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, 61791179 + ... + 61791212.

It is an arithmetic number, because the mean of its divisors is an integer number (556120764).

Almost surely, 2^2100900647 is an apocalyptic number.

2100900647 is a deficient number, since it is larger than the sum of its proper divisors (123582409).

2100900647 is a wasteful number, since it uses less digits than its factorization.

2100900647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123582408.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2100900647 is about 45835.5827605584. The cubic root of 2100900647 is about 1280.7622102160.

Adding to 2100900647 its reverse (7460090012), we get a palindrome (9560990659).

The spelling of 2100900647 in words is "two billion, one hundred million, nine hundred thousand, six hundred forty-seven".