84854009 has 2 divisors, whose sum is σ = 84854010. Its totient is φ = 84854008.

The previous prime is 84853999. The next prime is 84854023. The reversal of 84854009 is 90045848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73273600 + 11580409 = 8560^2 + 3403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84854009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84854069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42427004 + 42427005.

It is an arithmetic number, because the mean of its divisors is an integer number (42427005).

Almost surely, 2^84854009 is an apocalyptic number.

It is an amenable number.

84854009 is a deficient number, since it is larger than the sum of its proper divisors (1).

84854009 is an equidigital number, since it uses as much as digits as its factorization.

84854009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 84854009 is about 9211.6235811066. The cubic root of 84854009 is about 439.4310984288.

The spelling of 84854009 in words is "eighty-four million, eight hundred fifty-four thousand, nine".