99442 has 8 divisors (see below), whose sum is σ = 170496. Its totient is φ = 42612.

The previous prime is 99439. The next prime is 99469. The reversal of 99442 is 24499.

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

It is a super-2 number, since 2×99442² = 19777422728, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99442.

It is a congruent number.

It is an unprimeable 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 in 3 ways as a sum of consecutive naturals, for example, 3538 + ... + 3565.

It is an arithmetic number, because the mean of its divisors is an integer number (21312).

2⁹⁹⁴⁴² is an apocalyptic number.

99442 is a deficient number, since it is larger than the sum of its proper divisors (71054).

99442 is a wasteful number, since it uses less digits than its factorization.

99442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7112.

The product of its digits is 2592, while the sum is 28.

The square root of 99442 is about 315.3442563295. The cubic root of 99442 is about 46.3293937038.

The spelling of 99442 in words is "ninety-nine thousand, four hundred forty-two".