84884239801 has 3 divisors (see below), whose sum is σ = 84884531151. Its totient is φ = 84883948452.

The previous prime is 84884239793. The next prime is 84884239813. The reversal of 84884239801 is 10893248848.

It is a happy number.

The square root of 84884239801 is 291349.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 307967401 + 84576272400 = 17549^2 + 290820^2 .

It is not a de Polignac number, because 84884239801 - 2³ = 84884239793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84884239901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 145675 + ... + 437023.

It is an arithmetic number, because the mean of its divisors is an integer number (28294843717).

Almost surely, 2^84884239801 is an apocalyptic number.

84884239801 is the 291349-th square number.

84884239801 is the 145675-th centered octagonal number.

It is an amenable number.

84884239801 is a deficient number, since it is larger than the sum of its proper divisors (291350).

84884239801 is an frugal number, since it uses more digits than its factorization.

84884239801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582698 (or 291349 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 55.

The spelling of 84884239801 in words is "eighty-four billion, eight hundred eighty-four million, two hundred thirty-nine thousand, eight hundred one".