8427993 has 16 divisors (see below), whose sum is σ = 13117440. Its totient is φ = 4712976.

The previous prime is 8427977. The next prime is 8428003. The reversal of 8427993 is 3997248.

It is not a de Polignac number, because 8427993 - 2⁴ = 8427977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8427953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3283 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (819840).

Almost surely, 2^8427993 is an apocalyptic number.

It is an amenable number.

8427993 is a deficient number, since it is larger than the sum of its proper divisors (4689447).

8427993 is a wasteful number, since it uses less digits than its factorization.

8427993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8596.

The product of its digits is 108864, while the sum is 42.

The square root of 8427993 is about 2903.1005838586. The cubic root of 8427993 is about 203.5048303803.

The spelling of 8427993 in words is "eight million, four hundred twenty-seven thousand, nine hundred ninety-three".