83181013 has 2 divisors, whose sum is σ = 83181014. Its totient is φ = 83181012.

The previous prime is 83180989. The next prime is 83181047. The reversal of 83181013 is 31018138.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81757764 + 1423249 = 9042^2 + 1193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83181013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83181713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41590506 + 41590507.

It is an arithmetic number, because the mean of its divisors is an integer number (41590507).

Almost surely, 2^83181013 is an apocalyptic number.

It is an amenable number.

83181013 is a deficient number, since it is larger than the sum of its proper divisors (1).

83181013 is an equidigital number, since it uses as much as digits as its factorization.

83181013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 83181013 is about 9120.3625476184. The cubic root of 83181013 is about 436.5239419212.

The spelling of 83181013 in words is "eighty-three million, one hundred eighty-one thousand, thirteen".