2161899337 has 8 divisors (see below), whose sum is σ = 2408482440. Its totient is φ = 1926785280.

The previous prime is 2161899323. The next prime is 2161899349. The reversal of 2161899337 is 7339981612.

It can be written as a sum of positive squares in 4 ways, for example, as 65999376 + 2095899961 = 8124^2 + 45781^2 .

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 2161899337 - 2²³ = 2153510729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161899317) 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 7 ways as a sum of consecutive naturals, for example, 2866864 + ... + 2867617.

It is an arithmetic number, because the mean of its divisors is an integer number (301060305).

Almost surely, 2^2161899337 is an apocalyptic number.

It is an amenable number.

2161899337 is a deficient number, since it is larger than the sum of its proper divisors (246583103).

2161899337 is a wasteful number, since it uses less digits than its factorization.

2161899337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5734523.

The product of its digits is 489888, while the sum is 49.

The square root of 2161899337 is about 46496.2292772220. The cubic root of 2161899337 is about 1293.0395916776.

The spelling of 2161899337 in words is "two billion, one hundred sixty-one million, eight hundred ninety-nine thousand, three hundred thirty-seven".