2164025993 has 8 divisors (see below), whose sum is σ = 2227480200. Its totient is φ = 2100833280.

The previous prime is 2164025977. The next prime is 2164026017. The reversal of 2164025993 is 3995204612.

It can be written as a sum of positive squares in 4 ways, for example, as 1050602569 + 1113423424 = 32413^2 + 33368^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2164025993 - 2⁴ = 2164025977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2164025993.

It is not an unprimeable number, because it can be changed into a prime (2164025923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48518 + ... + 81743.

It is an arithmetic number, because the mean of its divisors is an integer number (278435025).

Almost surely, 2^2164025993 is an apocalyptic number.

It is an amenable number.

2164025993 is a deficient number, since it is larger than the sum of its proper divisors (63454207).

2164025993 is a wasteful number, since it uses less digits than its factorization.

2164025993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130747.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 2164025993 is about 46519.0927792020. The cubic root of 2164025993 is about 1293.4634395378.

The spelling of 2164025993 in words is "two billion, one hundred sixty-four million, twenty-five thousand, nine hundred ninety-three".