84905801 has 2 divisors, whose sum is σ = 84905802. Its totient is φ = 84905800.

The previous prime is 84905791. The next prime is 84905819. The reversal of 84905801 is 10850948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57395776 + 27510025 = 7576^2 + 5245^2 .

It is a cyclic number.

It is not a de Polignac number, because 84905801 - 2¹⁰ = 84904777 is a prime.

It is not a weakly prime, because it can be changed into another prime (84905831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42452900 + 42452901.

It is an arithmetic number, because the mean of its divisors is an integer number (42452901).

Almost surely, 2^84905801 is an apocalyptic number.

It is an amenable number.

84905801 is a deficient number, since it is larger than the sum of its proper divisors (1).

84905801 is an equidigital number, since it uses as much as digits as its factorization.

84905801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 84905801 is about 9214.4343830753. The cubic root of 84905801 is about 439.5204848422.

The spelling of 84905801 in words is "eighty-four million, nine hundred five thousand, eight hundred one".