99955554 has 8 divisors (see below), whose sum is σ = 199911120. Its totient is φ = 33318516.

The previous prime is 99955519. The next prime is 99955567. The reversal of 99955554 is 45555999.

It is a sphenic number, since it is the product of 3 distinct primes.

99955554 is an admirable number.

It is a super-2 number, since 2×99955554² = 19982225550893832, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99955497 and 99955506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8329624 + ... + 8329635.

It is an arithmetic number, because the mean of its divisors is an integer number (24988890).

Almost surely, 2^99955554 is an apocalyptic number.

99955554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99955554 is a wasteful number, since it uses less digits than its factorization.

99955554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16659264.

The product of its digits is 1822500, while the sum is 51.

The square root of 99955554 is about 9997.7774530142. Note that the first 3 decimals coincide. The cubic root of 99955554 is about 464.0901064850.

It can be divided in two parts, 99 and 955554, that added together give a triangular number (955653 = T₁₃₈₂).

The spelling of 99955554 in words is "ninety-nine million, nine hundred fifty-five thousand, five hundred fifty-four".