854922721 has 2 divisors, whose sum is σ = 854922722. Its totient is φ = 854922720.

The previous prime is 854922713. The next prime is 854922749. The reversal of 854922721 is 127229458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 854919121 + 3600 = 29239^2 + 60^2 .

It is a cyclic number.

It is not a de Polignac number, because 854922721 - 2³ = 854922713 is a prime.

It is not a weakly prime, because it can be changed into another prime (854922421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427461360 + 427461361.

It is an arithmetic number, because the mean of its divisors is an integer number (427461361).

Almost surely, 2^854922721 is an apocalyptic number.

It is an amenable number.

854922721 is a deficient number, since it is larger than the sum of its proper divisors (1).

854922721 is an equidigital number, since it uses as much as digits as its factorization.

854922721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 854922721 is about 29239.0615615481. The cubic root of 854922721 is about 949.0933995423.

The spelling of 854922721 in words is "eight hundred fifty-four million, nine hundred twenty-two thousand, seven hundred twenty-one".