219942969 has 8 divisors (see below), whose sum is σ = 293337600. Its totient is φ = 146588496.

The previous prime is 219942949. The next prime is 219943021. The reversal of 219942969 is 969249912.

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

It is not a de Polignac number, because 219942969 - 2¹³ = 219934777 is a prime.

It is a super-2 number, since 2×219942969² = 96749819225069922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (219942929) 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 7 ways as a sum of consecutive naturals, for example, 6759 + ... + 22035.

It is an arithmetic number, because the mean of its divisors is an integer number (36667200).

Almost surely, 2^219942969 is an apocalyptic number.

It is an amenable number.

219942969 is a deficient number, since it is larger than the sum of its proper divisors (73394631).

219942969 is a wasteful number, since it uses less digits than its factorization.

219942969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20079.

The product of its digits is 629856, while the sum is 51.

The square root of 219942969 is about 14830.4743349631. The cubic root of 219942969 is about 603.6289047241.

The spelling of 219942969 in words is "two hundred nineteen million, nine hundred forty-two thousand, nine hundred sixty-nine".