219368923 has 4 divisors (see below), whose sum is σ = 220581088. Its totient is φ = 218156760.

The previous prime is 219368911. The next prime is 219368951. The reversal of 219368923 is 329863912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219368923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 219368923.

It is not an unprimeable number, because it can be changed into a prime (219368423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605811 + ... + 606172.

It is an arithmetic number, because the mean of its divisors is an integer number (55145272).

Almost surely, 2^219368923 is an apocalyptic number.

219368923 is a deficient number, since it is larger than the sum of its proper divisors (1212165).

219368923 is a wasteful number, since it uses less digits than its factorization.

219368923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212164.

The product of its digits is 139968, while the sum is 43.

The square root of 219368923 is about 14811.1080949401. The cubic root of 219368923 is about 603.1032947454.

The spelling of 219368923 in words is "two hundred nineteen million, three hundred sixty-eight thousand, nine hundred twenty-three".