2172938903 has 4 divisors (see below), whose sum is σ = 2173089888. Its totient is φ = 2172787920.

The previous prime is 2172938897. The next prime is 2172938981. The reversal of 2172938903 is 3098392712.

It is a happy number.

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 2172938903 - 2²⁶ = 2105830039 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 (2172938203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51326 + ... + 83547.

It is an arithmetic number, because the mean of its divisors is an integer number (543272472).

Almost surely, 2^2172938903 is an apocalyptic number.

2172938903 is a deficient number, since it is larger than the sum of its proper divisors (150985).

2172938903 is a wasteful number, since it uses less digits than its factorization.

2172938903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150984.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 2172938903 is about 46614.7927486544. The cubic root of 2172938903 is about 1295.2367903790.

The spelling of 2172938903 in words is "two billion, one hundred seventy-two million, nine hundred thirty-eight thousand, nine hundred three".