2166953297 has 4 divisors (see below), whose sum is σ = 2294421156. Its totient is φ = 2039485440.

The previous prime is 2166953267. The next prime is 2166953333. The reversal of 2166953297 is 7923596612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1992818881 + 174134416 = 44641^2 + 13196^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166953297 - 2¹⁴ = 2166936913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166953207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63733904 + ... + 63733937.

It is an arithmetic number, because the mean of its divisors is an integer number (573605289).

Almost surely, 2^2166953297 is an apocalyptic number.

It is an amenable number.

2166953297 is a deficient number, since it is larger than the sum of its proper divisors (127467859).

2166953297 is a wasteful number, since it uses less digits than its factorization.

2166953297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127467858.

The product of its digits is 1224720, while the sum is 50.

The square root of 2166953297 is about 46550.5456144179. The cubic root of 2166953297 is about 1294.0464046084.

The spelling of 2166953297 in words is "two billion, one hundred sixty-six million, nine hundred fifty-three thousand, two hundred ninety-seven".