7938891 has 10 divisors (see below), whose sum is σ = 11859452. Its totient is φ = 5292540.

The previous prime is 7938877. The next prime is 7938893. The reversal of 7938891 is 1988397.

7938891 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7938891 - 2⁵ = 7938859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7938893) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 48925 + ... + 49086.

Almost surely, 2^7938891 is an apocalyptic number.

7938891 is a deficient number, since it is larger than the sum of its proper divisors (3920561).

7938891 is an equidigital number, since it uses as much as digits as its factorization.

7938891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98023 (or 98014 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 7938891 is about 2817.6037691627. The cubic root of 7938891 is about 199.4894561673.

The spelling of 7938891 in words is "seven million, nine hundred thirty-eight thousand, eight hundred ninety-one".