8378993 has 4 divisors (see below), whose sum is σ = 9576000. Its totient is φ = 7181988.

The previous prime is 8378989. The next prime is 8379017. The reversal of 8378993 is 3998738.

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.

It is a cyclic number.

It is not a de Polignac number, because 8378993 - 2² = 8378989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8378393) 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, 598493 + ... + 598506.

It is an arithmetic number, because the mean of its divisors is an integer number (2394000).

Almost surely, 2^8378993 is an apocalyptic number.

It is an amenable number.

8378993 is a deficient number, since it is larger than the sum of its proper divisors (1197007).

8378993 is a wasteful number, since it uses less digits than its factorization.

8378993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197006.

The product of its digits is 326592, while the sum is 47.

The square root of 8378993 is about 2894.6490288116. The cubic root of 8378993 is about 203.1096740468.

The spelling of 8378993 in words is "eight million, three hundred seventy-eight thousand, nine hundred ninety-three".