84448981 has 4 divisors (see below), whose sum is σ = 86042412. Its totient is φ = 82855552.

The previous prime is 84448951. The next prime is 84448993. The reversal of 84448981 is 18984448.

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 20848356 + 63600625 = 4566^2 + 7975^2 .

It is a cyclic number.

It is not a de Polignac number, because 84448981 - 2¹³ = 84440789 is a prime.

It is a super-2 number, since 2×84448981² = 14263260783876722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84448921) 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, 796636 + ... + 796741.

It is an arithmetic number, because the mean of its divisors is an integer number (21510603).

Almost surely, 2^84448981 is an apocalyptic number.

It is an amenable number.

84448981 is a deficient number, since it is larger than the sum of its proper divisors (1593431).

84448981 is a wasteful number, since it uses less digits than its factorization.

84448981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593430.

The product of its digits is 294912, while the sum is 46.

The square root of 84448981 is about 9189.6126686602. The cubic root of 84448981 is about 438.7308139542.

The spelling of 84448981 in words is "eighty-four million, four hundred forty-eight thousand, nine hundred eighty-one".