99991683 has 24 divisors (see below), whose sum is σ = 158186496. Its totient is φ = 60361200.

The previous prime is 99991673. The next prime is 99991687. The reversal of 99991683 is 38619999.

It is not a de Polignac number, because 99991683 - 2⁴ = 99991667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99991687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24966 + ... + 28692.

It is an arithmetic number, because the mean of its divisors is an integer number (6591104).

Almost surely, 2^99991683 is an apocalyptic number.

99991683 is a deficient number, since it is larger than the sum of its proper divisors (58194813).

99991683 is a wasteful number, since it uses less digits than its factorization.

99991683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015 (or 4012 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 99991683 is about 9999.5841413531. The cubic root of 99991683 is about 464.1460149731.

It can be divided in two parts, 999916 and 83, that added together give a palindrome (999999).

The spelling of 99991683 in words is "ninety-nine million, nine hundred ninety-one thousand, six hundred eighty-three".