7868921 has 8 divisors (see below), whose sum is σ = 8242560. Its totient is φ = 7497952.

The previous prime is 7868897. The next prime is 7868923. The reversal of 7868921 is 1298687.

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 7868921 - 2¹⁰ = 7867897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7868923) 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, 7781 + ... + 8733.

It is an arithmetic number, because the mean of its divisors is an integer number (1030320).

Almost surely, 2^7868921 is an apocalyptic number.

It is an amenable number.

7868921 is a deficient number, since it is larger than the sum of its proper divisors (373639).

7868921 is a wasteful number, since it uses less digits than its factorization.

7868921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335.

The product of its digits is 48384, while the sum is 41.

The square root of 7868921 is about 2805.1597102482. The cubic root of 7868921 is about 198.9016542245.

The spelling of 7868921 in words is "seven million, eight hundred sixty-eight thousand, nine hundred twenty-one".