99143642 has 16 divisors (see below), whose sum is σ = 165322752. Its totient is φ = 44282160.

The previous prime is 99143623. The next prime is 99143647. The reversal of 99143642 is 24634199.

It is a junction number, because it is equal to n+sod(n) for n = 99143596 and 99143605.

It is not an unprimeable number, because it can be changed into a prime (99143647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60698 + ... + 62309.

It is an arithmetic number, because the mean of its divisors is an integer number (10332672).

Almost surely, 2^99143642 is an apocalyptic number.

99143642 is a deficient number, since it is larger than the sum of its proper divisors (66179110).

99143642 is a wasteful number, since it uses less digits than its factorization.

99143642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123053.

The product of its digits is 46656, while the sum is 38.

The square root of 99143642 is about 9957.0900367527. The cubic root of 99143642 is about 462.8301292379.

The spelling of 99143642 in words is "ninety-nine million, one hundred forty-three thousand, six hundred forty-two".