99143549 has 8 divisors (see below), whose sum is σ = 104274432. Its totient is φ = 94133520.

The previous prime is 99143543. The next prime is 99143567. The reversal of 99143549 is 94534199.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 99143549 - 2²⁰ = 98094973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99143543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28529 + ... + 31814.

It is an arithmetic number, because the mean of its divisors is an integer number (13034304).

Almost surely, 2^99143549 is an apocalyptic number.

It is an amenable number.

99143549 is a deficient number, since it is larger than the sum of its proper divisors (5130883).

99143549 is a wasteful number, since it uses less digits than its factorization.

99143549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60427.

The product of its digits is 174960, while the sum is 44.

The square root of 99143549 is about 9957.0853667125. The cubic root of 99143549 is about 462.8299845212.

The spelling of 99143549 in words is "ninety-nine million, one hundred forty-three thousand, five hundred forty-nine".