8457999 has 16 divisors (see below), whose sum is σ = 12474624. Its totient is φ = 5054400.

The previous prime is 8457989. The next prime is 8458001. The reversal of 8457999 is 9997548.

It is a happy number.

It is not a de Polignac number, because 8457999 - 2⁹ = 8457487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8457989) 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, 654 + ... + 4164.

It is an arithmetic number, because the mean of its divisors is an integer number (779664).

Almost surely, 2^8457999 is an apocalyptic number.

8457999 is a deficient number, since it is larger than the sum of its proper divisors (4016625).

8457999 is a wasteful number, since it uses less digits than its factorization.

8457999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598.

The product of its digits is 816480, while the sum is 51.

The square root of 8457999 is about 2908.2639151219. The cubic root of 8457999 is about 203.7460556026.

The spelling of 8457999 in words is "eight million, four hundred fifty-seven thousand, nine hundred ninety-nine".