84861801 has 24 divisors (see below), whose sum is σ = 127250760. Its totient is φ = 54432000.

The previous prime is 84861779. The next prime is 84861811. The reversal of 84861801 is 10816848.

It can be written as a sum of positive squares in 4 ways, for example, as 22467600 + 62394201 = 4740^2 + 7899^2 .

It is not a de Polignac number, because 84861801 - 2⁵ = 84861769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84861811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140901 + ... + 141501.

It is an arithmetic number, because the mean of its divisors is an integer number (5302115).

Almost surely, 2^84861801 is an apocalyptic number.

It is an amenable number.

84861801 is a deficient number, since it is larger than the sum of its proper divisors (42388959).

84861801 is a wasteful number, since it uses less digits than its factorization.

84861801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 84861801 is about 9212.0465152972. The cubic root of 84861801 is about 439.4445487551. Note that the first 3 decimals are identical.

The spelling of 84861801 in words is "eighty-four million, eight hundred sixty-one thousand, eight hundred one".