8457997 has 4 divisors (see below), whose sum is σ = 8825760. Its totient is φ = 8090236.

The previous prime is 8457989. The next prime is 8458001. The reversal of 8457997 is 7997548.

It is a happy number.

8457997 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8457997 - 2³ = 8457989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8457997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2457997) 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, 183847 + ... + 183892.

It is an arithmetic number, because the mean of its divisors is an integer number (2206440).

Almost surely, 2^8457997 is an apocalyptic number.

It is an amenable number.

8457997 is a deficient number, since it is larger than the sum of its proper divisors (367763).

8457997 is a wasteful number, since it uses less digits than its factorization.

8457997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367762.

The product of its digits is 635040, while the sum is 49.

The square root of 8457997 is about 2908.2635712741. The cubic root of 8457997 is about 203.7460395431.

It can be divided in two parts, 84 and 57997, that added together give a square (58081 = 241²).

The spelling of 8457997 in words is "eight million, four hundred fifty-seven thousand, nine hundred ninety-seven".