885216091 has 2 divisors, whose sum is σ = 885216092. Its totient is φ = 885216090.

The previous prime is 885216077. The next prime is 885216113. The reversal of 885216091 is 190612588.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 885216091 - 2⁷ = 885215963 is a prime.

It is not a weakly prime, because it can be changed into another prime (885216041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442608045 + 442608046.

It is an arithmetic number, because the mean of its divisors is an integer number (442608046).

Almost surely, 2^885216091 is an apocalyptic number.

885216091 is a deficient number, since it is larger than the sum of its proper divisors (1).

885216091 is an equidigital number, since it uses as much as digits as its factorization.

885216091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 885216091 is about 29752.5812493639. The cubic root of 885216091 is about 960.1736126258.

The spelling of 885216091 in words is "eight hundred eighty-five million, two hundred sixteen thousand, ninety-one".