84884101721 has 2 divisors, whose sum is σ = 84884101722. Its totient is φ = 84884101720.

The previous prime is 84884101703. The next prime is 84884101811. The reversal of 84884101721 is 12710148848.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81830323600 + 3053778121 = 286060^2 + 55261^2 .

It is a cyclic number.

It is not a de Polignac number, because 84884101721 - 2²⁶ = 84816992857 is a prime.

It is not a weakly prime, because it can be changed into another prime (84884101121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42442050860 + 42442050861.

It is an arithmetic number, because the mean of its divisors is an integer number (42442050861).

Almost surely, 2^84884101721 is an apocalyptic number.

It is an amenable number.

84884101721 is a deficient number, since it is larger than the sum of its proper divisors (1).

84884101721 is an equidigital number, since it uses as much as digits as its factorization.

84884101721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 114688, while the sum is 44.

The spelling of 84884101721 in words is "eighty-four billion, eight hundred eighty-four million, one hundred one thousand, seven hundred twenty-one".