2100628973 has 4 divisors (see below), whose sum is σ = 2151863868. Its totient is φ = 2049394080.

The previous prime is 2100628963. The next prime is 2100629051. The reversal of 2100628973 is 3798260012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 193822084 + 1906806889 = 13922^2 + 43667^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100628973 - 2¹⁴ = 2100612589 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 (2100628963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25617386 + ... + 25617467.

It is an arithmetic number, because the mean of its divisors is an integer number (537965967).

Almost surely, 2^2100628973 is an apocalyptic number.

It is an amenable number.

2100628973 is a deficient number, since it is larger than the sum of its proper divisors (51234895).

2100628973 is an equidigital number, since it uses as much as digits as its factorization.

2100628973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51234894.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 2100628973 is about 45832.6190938288. The cubic root of 2100628973 is about 1280.7070013873.

Adding to 2100628973 its reverse (3798260012), we get a palindrome (5898888985).

The spelling of 2100628973 in words is "two billion, one hundred million, six hundred twenty-eight thousand, nine hundred seventy-three".