1663217323 has 8 divisors (see below), whose sum is σ = 1681175808. Its totient is φ = 1645293864.

The previous prime is 1663217291. The next prime is 1663217351. The reversal of 1663217323 is 3237123661.

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 1663217323 - 2⁵ = 1663217291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663217393) 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, 93036 + ... + 109462.

It is an arithmetic number, because the mean of its divisors is an integer number (210146976).

Almost surely, 2^1663217323 is an apocalyptic number.

1663217323 is a deficient number, since it is larger than the sum of its proper divisors (17958485).

1663217323 is a wasteful number, since it uses less digits than its factorization.

1663217323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17513.

The product of its digits is 27216, while the sum is 34.

The square root of 1663217323 is about 40782.5615061144. The cubic root of 1663217323 is about 1184.8126067566.

The spelling of 1663217323 in words is "one billion, six hundred sixty-three million, two hundred seventeen thousand, three hundred twenty-three".