8217423387 has 6 divisors (see below), whose sum is σ = 11869611572. Its totient is φ = 5478282252.

The previous prime is 8217423341. The next prime is 8217423421. The reversal of 8217423387 is 7833247128.

8217423387 is a `hidden beast` number, since 8 + 217 + 423 + 3 + 8 + 7 = 666.

It is not a de Polignac number, because 8217423387 - 2⁸ = 8217423131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8217423317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 456523513 + ... + 456523530.

Almost surely, 2^8217423387 is an apocalyptic number.

8217423387 is a deficient number, since it is larger than the sum of its proper divisors (3652188185).

8217423387 is a wasteful number, since it uses less digits than its factorization.

8217423387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913047049 (or 913047046 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 8217423387 is about 90650.0048924433. The cubic root of 8217423387 is about 2017.9569077966.

The spelling of 8217423387 in words is "eight billion, two hundred seventeen million, four hundred twenty-three thousand, three hundred eighty-seven".