7887091 has 8 divisors (see below), whose sum is σ = 8324640. Its totient is φ = 7457472.

The previous prime is 7887083. The next prime is 7887097. The reversal of 7887091 is 1907887.

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 7887091 - 2³ = 7887083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7887097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121 + ... + 3973.

It is an arithmetic number, because the mean of its divisors is an integer number (1040580).

Almost surely, 2^7887091 is an apocalyptic number.

7887091 is a deficient number, since it is larger than the sum of its proper divisors (437549).

7887091 is a wasteful number, since it uses less digits than its factorization.

7887091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 7887091 is about 2808.3965175879. The cubic root of 7887091 is about 199.0546300861.

It can be divided in two parts, 78870 and 91, that added together give a square (78961 = 281²).

The spelling of 7887091 in words is "seven million, eight hundred eighty-seven thousand, ninety-one".