83798581 has 2 divisors, whose sum is σ = 83798582. Its totient is φ = 83798580.

The previous prime is 83798579. The next prime is 83798621. The reversal of 83798581 is 18589738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77598481 + 6200100 = 8809^2 + 2490^2 .

It is a cyclic number.

It is not a de Polignac number, because 83798581 - 2¹ = 83798579 is a prime.

It is a super-2 number, since 2×83798581² = 14044404355227122, which contains 22 as substring.

Together with 83798579, it forms a pair of twin primes.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83798501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41899290 + 41899291.

It is an arithmetic number, because the mean of its divisors is an integer number (41899291).

Almost surely, 2^83798581 is an apocalyptic number.

It is an amenable number.

83798581 is a deficient number, since it is larger than the sum of its proper divisors (1).

83798581 is an equidigital number, since it uses as much as digits as its factorization.

83798581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 49.

The square root of 83798581 is about 9154.1564876290. The cubic root of 83798581 is about 437.6015868588.

The spelling of 83798581 in words is "eighty-three million, seven hundred ninety-eight thousand, five hundred eighty-one".