894844009 has 2 divisors, whose sum is σ = 894844010. Its totient is φ = 894844008.

The previous prime is 894843967. The next prime is 894844033. The reversal of 894844009 is 900448498.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 601475625 + 293368384 = 24525^2 + 17128^2 .

It is a cyclic number.

It is not a de Polignac number, because 894844009 - 2¹⁵ = 894811241 is a prime.

It is a super-4 number, since 4×894844009⁴ (a number of 37 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 894844009.

It is not a weakly prime, because it can be changed into another prime (894844099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447422004 + 447422005.

It is an arithmetic number, because the mean of its divisors is an integer number (447422005).

Almost surely, 2^894844009 is an apocalyptic number.

It is an amenable number.

894844009 is a deficient number, since it is larger than the sum of its proper divisors (1).

894844009 is an equidigital number, since it uses as much as digits as its factorization.

894844009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 894844009 is about 29913.9433876579. The cubic root of 894844009 is about 963.6421286156.

The spelling of 894844009 in words is "eight hundred ninety-four million, eight hundred forty-four thousand, nine".