8398791 has 6 divisors (see below), whose sum is σ = 12131600. Its totient is φ = 5599188.

The previous prime is 8398787. The next prime is 8398801. The reversal of 8398791 is 1978938.

It is not a de Polignac number, because 8398791 - 2² = 8398787 is a prime.

It is a Duffinian number.

8398791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8398721) 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, 466591 + ... + 466608.

Almost surely, 2^8398791 is an apocalyptic number.

8398791 is a deficient number, since it is larger than the sum of its proper divisors (3732809).

8398791 is a wasteful number, since it uses less digits than its factorization.

8398791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933205 (or 933202 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 8398791 is about 2898.0667694172. The cubic root of 8398791 is about 203.2695183300.

The spelling of 8398791 in words is "eight million, three hundred ninety-eight thousand, seven hundred ninety-one".