7864897 has 4 divisors (see below), whose sum is σ = 8327556. Its totient is φ = 7402240.

The previous prime is 7864867. The next prime is 7864903. The reversal of 7864897 is 7984687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7160976 + 703921 = 2676^2 + 839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7864897 is a prime.

It is a d-powerful number, because it can be written as 7⁴ + 8³ + 6 + 4² + 8⁷ + 9 + 7⁸ .

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 7864897.

It is not an unprimeable number, because it can be changed into a prime (7864817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231304 + ... + 231337.

It is an arithmetic number, because the mean of its divisors is an integer number (2081889).

Almost surely, 2^7864897 is an apocalyptic number.

It is an amenable number.

7864897 is a deficient number, since it is larger than the sum of its proper divisors (462659).

7864897 is a wasteful number, since it uses less digits than its factorization.

7864897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462658.

The product of its digits is 677376, while the sum is 49.

The square root of 7864897 is about 2804.4423688142. The cubic root of 7864897 is about 198.8677437418.

The spelling of 7864897 in words is "seven million, eight hundred sixty-four thousand, eight hundred ninety-seven".