2161028973 has 16 divisors (see below), whose sum is σ = 3035750400. Its totient is φ = 1363633200.

The previous prime is 2161028959. The next prime is 2161028977. The reversal of 2161028973 is 3798201612.

It is not a de Polignac number, because 2161028973 - 2¹⁷ = 2160897901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161028977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49138 + ... + 82076.

It is an arithmetic number, because the mean of its divisors is an integer number (189734400).

Almost surely, 2^2161028973 is an apocalyptic number.

It is an amenable number.

2161028973 is a deficient number, since it is larger than the sum of its proper divisors (874721427).

2161028973 is a wasteful number, since it uses less digits than its factorization.

2161028973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34112.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 2161028973 is about 46486.8688233570. The cubic root of 2161028973 is about 1292.8660457969.

The spelling of 2161028973 in words is "two billion, one hundred sixty-one million, twenty-eight thousand, nine hundred seventy-three".