2172934939 has 24 divisors (see below), whose sum is σ = 2622250800. Its totient is φ = 1793211840.

The previous prime is 2172934931. The next prime is 2172934949. The reversal of 2172934939 is 9394392712.

It is not a de Polignac number, because 2172934939 - 2³ = 2172934931 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2172934892 and 2172934901.

It is not an unprimeable number, because it can be changed into a prime (2172934931) 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 23 ways as a sum of consecutive naturals, for example, 550804 + ... + 554734.

It is an arithmetic number, because the mean of its divisors is an integer number (109260450).

Almost surely, 2^2172934939 is an apocalyptic number.

2172934939 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2172934939 is a deficient number, since it is larger than the sum of its proper divisors (449315861).

2172934939 is a wasteful number, since it uses less digits than its factorization.

2172934939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363 (or 4356 counting only the distinct ones).

The product of its digits is 734832, while the sum is 49.

The square root of 2172934939 is about 46614.7502299433. The cubic root of 2172934939 is about 1295.2360027634.

The spelling of 2172934939 in words is "two billion, one hundred seventy-two million, nine hundred thirty-four thousand, nine hundred thirty-nine".