1223578889 has 8 divisors (see below), whose sum is σ = 1348345152. Its totient is φ = 1103190480.

The previous prime is 1223578877. The next prime is 1223578913. The reversal of 1223578889 is 9888753221.

It is a happy number.

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 1223578889 - 2²⁰ = 1222530313 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1223578889.

It is not an unprimeable number, because it can be changed into a prime (1223578189) 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, 1093877 + ... + 1094994.

It is an arithmetic number, because the mean of its divisors is an integer number (168543144).

Almost surely, 2^1223578889 is an apocalyptic number.

It is an amenable number.

1223578889 is a deficient number, since it is larger than the sum of its proper divisors (124766263).

1223578889 is a wasteful number, since it uses less digits than its factorization.

1223578889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188927.

The product of its digits is 1935360, while the sum is 53.

The square root of 1223578889 is about 34979.6925229482. The cubic root of 1223578889 is about 1069.5735596514.

The spelling of 1223578889 in words is "one billion, two hundred twenty-three million, five hundred seventy-eight thousand, eight hundred eighty-nine".