84167587989 has 6 divisors (see below), whose sum is σ = 121575404886. Its totient is φ = 56111725320.

The previous prime is 84167587967. The next prime is 84167587997. The reversal of 84167587989 is 98978576148.

It can be written as a sum of positive squares in only one way, i.e., 71311429764 + 12856158225 = 267042^2 + 113385^2 .

It is not a de Polignac number, because 84167587989 - 2¹² = 84167583893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84167597989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4675977102 + ... + 4675977119.

It is an arithmetic number, because the mean of its divisors is an integer number (20262567481).

Almost surely, 2^84167587989 is an apocalyptic number.

It is an amenable number.

84167587989 is a deficient number, since it is larger than the sum of its proper divisors (37407816897).

84167587989 is a wasteful number, since it uses less digits than its factorization.

84167587989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9351954227 (or 9351954224 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 72.

The spelling of 84167587989 in words is "eighty-four billion, one hundred sixty-seven million, five hundred eighty-seven thousand, nine hundred eighty-nine".