1423661217 has 8 divisors (see below), whose sum is σ = 2070780000. Its totient is φ = 862824960.

The previous prime is 1423661201. The next prime is 1423661227. The reversal of 1423661217 is 7121663241.

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

It is not a de Polignac number, because 1423661217 - 2⁴ = 1423661201 is a prime.

It is a super-2 number, since 2×1423661217² = 4053622521579842178, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 43141249 = 1423661217 / (1 + 4 + 2 + 3 + 6 + 6 + 1 + 2 + 1 + 7).

It is not an unprimeable number, because it can be changed into a prime (1423661227) 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, 21570592 + ... + 21570657.

It is an arithmetic number, because the mean of its divisors is an integer number (258847500).

Almost surely, 2^1423661217 is an apocalyptic number.

It is an amenable number.

1423661217 is a deficient number, since it is larger than the sum of its proper divisors (647118783).

1423661217 is a wasteful number, since it uses less digits than its factorization.

1423661217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43141263.

The product of its digits is 12096, while the sum is 33.

The square root of 1423661217 is about 37731.4353954365. The cubic root of 1423661217 is about 1124.9560389735.

The spelling of 1423661217 in words is "one billion, four hundred twenty-three million, six hundred sixty-one thousand, two hundred seventeen".