99843749 has 8 divisors (see below), whose sum is σ = 101776920. Its totient is φ = 97929216.

The previous prime is 99843739. The next prime is 99843769. The reversal of 99843749 is 94734899.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3214849 + 96628900 = 1793^2 + 9830^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99843749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99843749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99843719) 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, 6407 + ... + 15515.

It is an arithmetic number, because the mean of its divisors is an integer number (12722115).

Almost surely, 2^99843749 is an apocalyptic number.

It is an amenable number.

99843749 is a deficient number, since it is larger than the sum of its proper divisors (1933171).

99843749 is a wasteful number, since it uses less digits than its factorization.

99843749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319.

The product of its digits is 1959552, while the sum is 53.

The square root of 99843749 is about 9992.1843958166. The cubic root of 99843749 is about 463.9170063735.

The spelling of 99843749 in words is "ninety-nine million, eight hundred forty-three thousand, seven hundred forty-nine".