83857663 has 2 divisors, whose sum is σ = 83857664. Its totient is φ = 83857662.

The previous prime is 83857661. The next prime is 83857667. The reversal of 83857663 is 36675838.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83857663 - 2¹ = 83857661 is a prime.

Together with 83857661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83857661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41928831 + 41928832.

It is an arithmetic number, because the mean of its divisors is an integer number (41928832).

Almost surely, 2^83857663 is an apocalyptic number.

83857663 is a deficient number, since it is larger than the sum of its proper divisors (1).

83857663 is an equidigital number, since it uses as much as digits as its factorization.

83857663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 46.

The square root of 83857663 is about 9157.3829776853. The cubic root of 83857663 is about 437.7044060348.

The spelling of 83857663 in words is "eighty-three million, eight hundred fifty-seven thousand, six hundred sixty-three".