83617381 has 2 divisors, whose sum is σ = 83617382. Its totient is φ = 83617380.

The previous prime is 83617367. The next prime is 83617399. The reversal of 83617381 is 18371638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81540900 + 2076481 = 9030^2 + 1441^2 .

It is a cyclic number.

It is not a de Polignac number, because 83617381 - 2⁵ = 83617349 is a prime.

It is a super-2 number, since 2×83617381² = 13983732810598322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 83617381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83617361) 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, 41808690 + 41808691.

It is an arithmetic number, because the mean of its divisors is an integer number (41808691).

Almost surely, 2^83617381 is an apocalyptic number.

It is an amenable number.

83617381 is a deficient number, since it is larger than the sum of its proper divisors (1).

83617381 is an equidigital number, since it uses as much as digits as its factorization.

83617381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 83617381 is about 9144.2539881611. The cubic root of 83617381 is about 437.2859465535.

The spelling of 83617381 in words is "eighty-three million, six hundred seventeen thousand, three hundred eighty-one".