83016581 has 2 divisors, whose sum is σ = 83016582. Its totient is φ = 83016580.

The previous prime is 83016511. The next prime is 83016607. The reversal of 83016581 is 18561038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81739681 + 1276900 = 9041^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 83016581 - 2²² = 78822277 is a prime.

It is a super-2 number, since 2×83016581² = 13783505441859122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83016511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41508290 + 41508291.

It is an arithmetic number, because the mean of its divisors is an integer number (41508291).

Almost surely, 2^83016581 is an apocalyptic number.

It is an amenable number.

83016581 is a deficient number, since it is larger than the sum of its proper divisors (1).

83016581 is an equidigital number, since it uses as much as digits as its factorization.

83016581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 83016581 is about 9111.3435342983. The cubic root of 83016581 is about 436.2361123977.

The spelling of 83016581 in words is "eighty-three million, sixteen thousand, five hundred eighty-one".