99945554 has 4 divisors (see below), whose sum is σ = 149918334. Its totient is φ = 49972776.

The previous prime is 99945553. The next prime is 99945563. The reversal of 99945554 is 45554999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 92256025 + 7689529 = 9605^2 + 2773^2 .

It is a super-2 number, since 2×99945554² = 19978227528733832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99945553) 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 as a sum of consecutive naturals, namely, 24986387 + ... + 24986390.

Almost surely, 2^99945554 is an apocalyptic number.

99945554 is a deficient number, since it is larger than the sum of its proper divisors (49972780).

99945554 is a wasteful number, since it uses less digits than its factorization.

99945554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49972779.

The product of its digits is 1458000, while the sum is 50.

The square root of 99945554 is about 9997.2773293532. The cubic root of 99945554 is about 464.0746294199.

The spelling of 99945554 in words is "ninety-nine million, nine hundred forty-five thousand, five hundred fifty-four".