2109917253 has 4 divisors (see below), whose sum is σ = 2813223008. Its totient is φ = 1406611500.

The previous prime is 2109917221. The next prime is 2109917261. The reversal of 2109917253 is 3527199012.

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 not a de Polignac number, because 2109917253 - 2⁵ = 2109917221 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 (2109917203) 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, 351652873 + ... + 351652878.

It is an arithmetic number, because the mean of its divisors is an integer number (703305752).

Almost surely, 2^2109917253 is an apocalyptic number.

It is an amenable number.

2109917253 is a deficient number, since it is larger than the sum of its proper divisors (703305755).

2109917253 is an equidigital number, since it uses as much as digits as its factorization.

2109917253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703305754.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 2109917253 is about 45933.8356007856. The cubic root of 2109917253 is about 1282.5918456542.

The spelling of 2109917253 in words is "two billion, one hundred nine million, nine hundred seventeen thousand, two hundred fifty-three".