1224666889 has 4 divisors (see below), whose sum is σ = 1228004224. Its totient is φ = 1221329556.

The previous prime is 1224666853. The next prime is 1224666917. The reversal of 1224666889 is 9886664221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9886664221 = 7 ⋅1412380603.

It is a cyclic number.

It is not a de Polignac number, because 1224666889 - 2¹³ = 1224658697 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1224666829) 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, 1668117 + ... + 1668850.

It is an arithmetic number, because the mean of its divisors is an integer number (307001056).

Almost surely, 2^1224666889 is an apocalyptic number.

It is an amenable number.

1224666889 is a deficient number, since it is larger than the sum of its proper divisors (3337335).

1224666889 is an equidigital number, since it uses as much as digits as its factorization.

1224666889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337334.

The product of its digits is 1990656, while the sum is 52.

The square root of 1224666889 is about 34995.2409478775. The cubic root of 1224666889 is about 1069.8904854871.

The spelling of 1224666889 in words is "one billion, two hundred twenty-four million, six hundred sixty-six thousand, eight hundred eighty-nine".