99985538 has 4 divisors (see below), whose sum is σ = 149978310. Its totient is φ = 49992768.

The previous prime is 99985489. The next prime is 99985547. The reversal of 99985538 is 83558999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83558999 = 463 ⋅180473.

It can be written as a sum of positive squares in only one way, i.e., 79798489 + 20187049 = 8933^2 + 4493^2 .

It is a Curzon number.

It is an unprimeable number.

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, 24996383 + ... + 24996386.

Almost surely, 2^99985538 is an apocalyptic number.

99985538 is a deficient number, since it is larger than the sum of its proper divisors (49992772).

99985538 is a wasteful number, since it uses less digits than its factorization.

99985538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49992771.

The product of its digits is 3499200, while the sum is 56.

The square root of 99985538 is about 9999.2768738544. The cubic root of 99985538 is about 464.1365067300.

The spelling of 99985538 in words is "ninety-nine million, nine hundred eighty-five thousand, five hundred thirty-eight".