2189971653 has 8 divisors (see below), whose sum is σ = 2920508448. Its totient is φ = 1459707984.

The previous prime is 2189971649. The next prime is 2189971661. The reversal of 2189971653 is 3561799812.

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

It is not a de Polignac number, because 2189971653 - 2² = 2189971649 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2189971596 and 2189971605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189971633) 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, 48775 + ... + 82212.

It is an arithmetic number, because the mean of its divisors is an integer number (365063556).

Almost surely, 2^2189971653 is an apocalyptic number.

It is an amenable number.

2189971653 is a deficient number, since it is larger than the sum of its proper divisors (730536795).

2189971653 is a wasteful number, since it uses less digits than its factorization.

2189971653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136563.

The product of its digits is 816480, while the sum is 51.

The square root of 2189971653 is about 46797.1329570520. The cubic root of 2189971653 is about 1298.6122573841.

The spelling of 2189971653 in words is "two billion, one hundred eighty-nine million, nine hundred seventy-one thousand, six hundred fifty-three".