894778091 has 2 divisors, whose sum is σ = 894778092. Its totient is φ = 894778090.

The previous prime is 894778081. The next prime is 894778111. The reversal of 894778091 is 190877498.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 894778091 - 2²² = 890583787 is a prime.

It is not a weakly prime, because it can be changed into another prime (894778021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447389045 + 447389046.

It is an arithmetic number, because the mean of its divisors is an integer number (447389046).

Almost surely, 2^894778091 is an apocalyptic number.

894778091 is a deficient number, since it is larger than the sum of its proper divisors (1).

894778091 is an equidigital number, since it uses as much as digits as its factorization.

894778091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 894778091 is about 29912.8415734781. The cubic root of 894778091 is about 963.6184660476.

The spelling of 894778091 in words is "eight hundred ninety-four million, seven hundred seventy-eight thousand, ninety-one".