84798689749 has 4 divisors (see below), whose sum is σ = 84808997836. Its totient is φ = 84788381664.

The previous prime is 84798689713. The next prime is 84798689761. The reversal of 84798689749 is 94798689748.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51644835025 + 33153854724 = 227255^2 + 182082^2 .

It is a cyclic number.

It is not a de Polignac number, because 84798689749 - 2¹⁹ = 84798165461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84798699749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5141694 + ... + 5158159.

It is an arithmetic number, because the mean of its divisors is an integer number (21202249459).

Almost surely, 2^84798689749 is an apocalyptic number.

It is an amenable number.

84798689749 is a deficient number, since it is larger than the sum of its proper divisors (10308087).

84798689749 is a wasteful number, since it uses less digits than its factorization.

84798689749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10308086.

The product of its digits is 1755758592, while the sum is 79.

Subtracting 84798689749 from its reverse (94798689748), we obtain a palindrome (9999999999).

The spelling of 84798689749 in words is "eighty-four billion, seven hundred ninety-eight million, six hundred eighty-nine thousand, seven hundred forty-nine".