219889649 has 8 divisors (see below), whose sum is σ = 251460288. Its totient is φ = 188358480.

The previous prime is 219889643. The next prime is 219889661. The reversal of 219889649 is 946988912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219889649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 219889594 and 219889603.

It is not an unprimeable number, because it can be changed into a prime (219889643) 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, 3239 + ... + 21219.

It is an arithmetic number, because the mean of its divisors is an integer number (31432536).

Almost surely, 2^219889649 is an apocalyptic number.

It is an amenable number.

219889649 is a deficient number, since it is larger than the sum of its proper divisors (31570639).

219889649 is a wasteful number, since it uses less digits than its factorization.

219889649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19735.

The product of its digits is 2239488, while the sum is 56.

The square root of 219889649 is about 14828.6765761480. The cubic root of 219889649 is about 603.5801222381.

The spelling of 219889649 in words is "two hundred nineteen million, eight hundred eighty-nine thousand, six hundred forty-nine".