99985442 has 4 divisors (see below), whose sum is σ = 149978166. Its totient is φ = 49992720.

The previous prime is 99985441. The next prime is 99985463. The reversal of 99985442 is 24458999.

It is a happy number.

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., 97199881 + 2785561 = 9859^2 + 1669^2 .

It is a super-2 number, since 2×99985442² = 19994177223870728, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99985441) 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, 24996359 + ... + 24996362.

Almost surely, 2^99985442 is an apocalyptic number.

99985442 is a deficient number, since it is larger than the sum of its proper divisors (49992724).

99985442 is a wasteful number, since it uses less digits than its factorization.

99985442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49992723.

The product of its digits is 933120, while the sum is 50.

The square root of 99985442 is about 9999.2720735062. The cubic root of 99985442 is about 464.1363581848.

The spelling of 99985442 in words is "ninety-nine million, nine hundred eighty-five thousand, four hundred forty-two".