2173928345 has 16 divisors (see below), whose sum is σ = 2629065600. Its totient is φ = 1725613824.

The previous prime is 2173928321. The next prime is 2173928353. The reversal of 2173928345 is 5438293712.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2173928345 - 2⁸ = 2173928089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2173928296 and 2173928305.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 534881 + ... + 538929.

It is an arithmetic number, because the mean of its divisors is an integer number (164316600).

Almost surely, 2^2173928345 is an apocalyptic number.

It is an amenable number.

2173928345 is a deficient number, since it is larger than the sum of its proper divisors (455137255).

2173928345 is a wasteful number, since it uses less digits than its factorization.

2173928345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4864.

The product of its digits is 362880, while the sum is 44.

The square root of 2173928345 is about 46625.4045022668. The cubic root of 2173928345 is about 1295.4333547661.

The spelling of 2173928345 in words is "two billion, one hundred seventy-three million, nine hundred twenty-eight thousand, three hundred forty-five".