99943849 has 4 divisors (see below), whose sum is σ = 101829636. Its totient is φ = 98058064.

The previous prime is 99943847. The next prime is 99943873. The reversal of 99943849 is 94834999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94834999 = 7 ⋅13547857.

It can be written as a sum of positive squares in 2 ways, for example, as 37027225 + 62916624 = 6085^2 + 7932^2 .

It is a cyclic number.

It is not a de Polignac number, because 99943849 - 2¹ = 99943847 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 99943849.

It is not an unprimeable number, because it can be changed into a prime (99943841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942814 + ... + 942919.

It is an arithmetic number, because the mean of its divisors is an integer number (25457409).

Almost surely, 2^99943849 is an apocalyptic number.

It is an amenable number.

99943849 is a deficient number, since it is larger than the sum of its proper divisors (1885787).

99943849 is a wasteful number, since it uses less digits than its factorization.

99943849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885786.

The product of its digits is 2519424, while the sum is 55.

The square root of 99943849 is about 9997.1920557725. The cubic root of 99943849 is about 464.0719904773.

The spelling of 99943849 in words is "ninety-nine million, nine hundred forty-three thousand, eight hundred forty-nine".