8778091 has 4 divisors (see below), whose sum is σ = 10032112. Its totient is φ = 7524072.

The previous prime is 8778061. The next prime is 8778101. The reversal of 8778091 is 1908778.

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

It is a cyclic number.

It is not a de Polignac number, because 8778091 - 2¹³ = 8769899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8778041) 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 3 ways as a sum of consecutive naturals, for example, 627000 + ... + 627013.

It is an arithmetic number, because the mean of its divisors is an integer number (2508028).

Almost surely, 2^8778091 is an apocalyptic number.

8778091 is a deficient number, since it is larger than the sum of its proper divisors (1254021).

8778091 is a wasteful number, since it uses less digits than its factorization.

8778091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254020.

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

The square root of 8778091 is about 2962.7843323469. The cubic root of 8778091 is about 206.2845456674.

The spelling of 8778091 in words is "eight million, seven hundred seventy-eight thousand, ninety-one".