83806605 has 24 divisors (see below), whose sum is σ = 145906488. Its totient is φ = 44499456.

The previous prime is 83806601. The next prime is 83806631. The reversal of 83806605 is 50660838.

It can be written as a sum of positive squares in 4 ways, for example, as 522729 + 83283876 = 723^2 + 9126^2 .

It is not a de Polignac number, because 83806605 - 2² = 83806601 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 83806605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83806601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6489 + ... + 14481.

It is an arithmetic number, because the mean of its divisors is an integer number (6079437).

Almost surely, 2^83806605 is an apocalyptic number.

It is an amenable number.

83806605 is a deficient number, since it is larger than the sum of its proper divisors (62099883).

83806605 is a wasteful number, since it uses less digits than its factorization.

83806605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8237 (or 8234 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 83806605 is about 9154.5947479940. The cubic root of 83806605 is about 437.6155536946.

The spelling of 83806605 in words is "eighty-three million, eight hundred six thousand, six hundred five".