84985123501 has 2 divisors, whose sum is σ = 84985123502. Its totient is φ = 84985123500.

The previous prime is 84985123459. The next prime is 84985123513. The reversal of 84985123501 is 10532158948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81766830601 + 3218292900 = 285949^2 + 56730^2 .

It is a cyclic number.

It is not a de Polignac number, because 84985123501 - 2⁷ = 84985123373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84985123591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42492561750 + 42492561751.

It is an arithmetic number, because the mean of its divisors is an integer number (42492561751).

Almost surely, 2^84985123501 is an apocalyptic number.

It is an amenable number.

84985123501 is a deficient number, since it is larger than the sum of its proper divisors (1).

84985123501 is an equidigital number, since it uses as much as digits as its factorization.

84985123501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 84985123501 in words is "eighty-four billion, nine hundred eighty-five million, one hundred twenty-three thousand, five hundred one".