83127817 has 2 divisors, whose sum is σ = 83127818. Its totient is φ = 83127816.

The previous prime is 83127809. The next prime is 83127827. The reversal of 83127817 is 71872138.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61402896 + 21724921 = 7836^2 + 4661^2 .

It is a cyclic number.

It is not a de Polignac number, because 83127817 - 2³ = 83127809 is a prime.

It is not a weakly prime, because it can be changed into another prime (83127827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41563908 + 41563909.

It is an arithmetic number, because the mean of its divisors is an integer number (41563909).

Almost surely, 2^83127817 is an apocalyptic number.

It is an amenable number.

83127817 is a deficient number, since it is larger than the sum of its proper divisors (1).

83127817 is an equidigital number, since it uses as much as digits as its factorization.

83127817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 37.

The square root of 83127817 is about 9117.4457497701. The cubic root of 83127817 is about 436.4308666760.

It can be divided in two parts, 8312 and 7817, that added together give a square (16129 = 127²).

The spelling of 83127817 in words is "eighty-three million, one hundred twenty-seven thousand, eight hundred seventeen".