99191642 has 8 divisors (see below), whose sum is σ = 162313632. Its totient is φ = 45087100.

The previous prime is 99191639. The next prime is 99191671. The reversal of 99191642 is 24619199.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 99191642.

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, 2254334 + ... + 2254377.

It is an arithmetic number, because the mean of its divisors is an integer number (20289204).

Almost surely, 2^99191642 is an apocalyptic number.

99191642 is a deficient number, since it is larger than the sum of its proper divisors (63121990).

99191642 is a wasteful number, since it uses less digits than its factorization.

99191642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508724.

The product of its digits is 34992, while the sum is 41.

The square root of 99191642 is about 9959.5000878558. The cubic root of 99191642 is about 462.9048096426.

The spelling of 99191642 in words is "ninety-nine million, one hundred ninety-one thousand, six hundred forty-two".