894809091 has 16 divisors (see below), whose sum is σ = 1302658560. Its totient is φ = 541842720.

The previous prime is 894809087. The next prime is 894809099. The reversal of 894809091 is 190908498.

It is not a de Polignac number, because 894809091 - 2² = 894809087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 894809091.

It is not an unprimeable number, because it can be changed into a prime (894809099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29526 + ... + 51588.

It is an arithmetic number, because the mean of its divisors is an integer number (81416160).

Almost surely, 2^894809091 is an apocalyptic number.

894809091 is a deficient number, since it is larger than the sum of its proper divisors (407849469).

894809091 is a wasteful number, since it uses less digits than its factorization.

894809091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23306.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 894809091 is about 29913.3597410923. The cubic root of 894809091 is about 963.6295942546.

The spelling of 894809091 in words is "eight hundred ninety-four million, eight hundred nine thousand, ninety-one".