83806563 has 16 divisors (see below), whose sum is σ = 113461920. Its totient is φ = 55017984.

The previous prime is 83806561. The next prime is 83806571. The reversal of 83806563 is 36560838.

It is not a de Polignac number, because 83806563 - 2¹ = 83806561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83806561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57933 + ... + 59361.

It is an arithmetic number, because the mean of its divisors is an integer number (7091370).

Almost surely, 2^83806563 is an apocalyptic number.

83806563 is a deficient number, since it is larger than the sum of its proper divisors (29655357).

83806563 is a wasteful number, since it uses less digits than its factorization.

83806563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 83806563 is about 9154.5924540637. The cubic root of 83806563 is about 437.6154805904.

The spelling of 83806563 in words is "eighty-three million, eight hundred six thousand, five hundred sixty-three".