98774447789 has 4 divisors (see below), whose sum is σ = 102180463260. Its totient is φ = 95368432320.

The previous prime is 98774447773. The next prime is 98774447801.

98774447789 is nontrivially palindromic in base 10.

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 29877122500 + 68897325289 = 172850^2 + 262483^2 .

It is a cyclic number.

It is not a de Polignac number, because 98774447789 - 2⁴ = 98774447773 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 (98774447719) 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, 1703007692 + ... + 1703007749.

It is an arithmetic number, because the mean of its divisors is an integer number (25545115815).

Almost surely, 2^98774447789 is an apocalyptic number.

It is an amenable number.

98774447789 is a deficient number, since it is larger than the sum of its proper divisors (3406015471).

98774447789 is a wasteful number, since it uses less digits than its factorization.

98774447789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406015470.

The product of its digits is 796594176, while the sum is 74.

The spelling of 98774447789 in words is "ninety-eight billion, seven hundred seventy-four million, four hundred forty-seven thousand, seven hundred eighty-nine".