7897457 has 8 divisors (see below), whose sum is σ = 8142336. Its totient is φ = 7655872.

The previous prime is 7897453. The next prime is 7897471. The reversal of 7897457 is 7547987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7897457 - 2² = 7897453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7897453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4568 + ... + 6054.

It is an arithmetic number, because the mean of its divisors is an integer number (1017792).

Almost surely, 2^7897457 is an apocalyptic number.

It is an amenable number.

7897457 is a deficient number, since it is larger than the sum of its proper divisors (244879).

7897457 is a wasteful number, since it uses less digits than its factorization.

7897457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647.

The product of its digits is 493920, while the sum is 47.

The square root of 7897457 is about 2810.2414487015. The cubic root of 7897457 is about 199.1417977115.

The spelling of 7897457 in words is "seven million, eight hundred ninety-seven thousand, four hundred fifty-seven".