83449921129 has 3 divisors (see below), whose sum is σ = 83450210007. Its totient is φ = 83449632252.

The previous prime is 83449921117. The next prime is 83449921141. The reversal of 83449921129 is 92112994438.

The square root of 83449921129 is 288877.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (83449921117) and next prime (83449921141).

It can be written as a sum of positive squares in only one way, i.e., 79205659225 + 4244261904 = 281435^2 + 65148^2 .

It is not a de Polignac number, because 83449921129 - 2¹³ = 83449912937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83449921199) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 144439 + ... + 433315.

It is an arithmetic number, because the mean of its divisors is an integer number (27816736669).

Almost surely, 2^83449921129 is an apocalyptic number.

83449921129 is the 288877-th square number.

83449921129 is the 144439-th centered octagonal number.

It is an amenable number.

83449921129 is a deficient number, since it is larger than the sum of its proper divisors (288878).

83449921129 is an frugal number, since it uses more digits than its factorization.

83449921129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577754 (or 288877 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 52.

The spelling of 83449921129 in words is "eighty-three billion, four hundred forty-nine million, nine hundred twenty-one thousand, one hundred twenty-nine".