83128849 has 2 divisors, whose sum is σ = 83128850. Its totient is φ = 83128848.

The previous prime is 83128813. The next prime is 83128873. The reversal of 83128849 is 94882138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52823824 + 30305025 = 7268^2 + 5505^2 .

It is a cyclic number.

It is not a de Polignac number, because 83128849 - 2¹³ = 83120657 is a prime.

It is not a weakly prime, because it can be changed into another prime (83128879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41564424 + 41564425.

It is an arithmetic number, because the mean of its divisors is an integer number (41564425).

Almost surely, 2^83128849 is an apocalyptic number.

It is an amenable number.

83128849 is a deficient number, since it is larger than the sum of its proper divisors (1).

83128849 is an equidigital number, since it uses as much as digits as its factorization.

83128849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 43.

The square root of 83128849 is about 9117.5023443924. The cubic root of 83128849 is about 436.4326727092.

It can be divided in two parts, 8312 and 8849, that added together give a square (17161 = 131²).

The spelling of 83128849 in words is "eighty-three million, one hundred twenty-eight thousand, eight hundred forty-nine".