99556 has 6 divisors (see below), whose sum is σ = 174230. Its totient is φ = 49776.

The previous prime is 99551. The next prime is 99559. The reversal of 99556 is 65599.

99556 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in only one way, i.e., 52900 + 46656 = 230^2 + 216^2 .

It is a super-2 number, since 2×99556² = 19822794272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99551) by changing a digit.

99556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12441 + ... + 12448.

2⁹⁹⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

99556 is a deficient number, since it is larger than the sum of its proper divisors (74674).

99556 is a wasteful number, since it uses less digits than its factorization.

99556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24893 (or 24891 counting only the distinct ones).

The product of its digits is 12150, while the sum is 34.

The square root of 99556 is about 315.5249593931. The cubic root of 99556 is about 46.3470909005.

The spelling of 99556 in words is "ninety-nine thousand, five hundred fifty-six".