99943785 has 12 divisors (see below), whose sum is σ = 173235972. Its totient is φ = 53303328.

The previous prime is 99943751. The next prime is 99943801. The reversal of 99943785 is 58734999.

It can be written as a sum of positive squares in 2 ways, for example, as 70913241 + 29030544 = 8421^2 + 5388^2 .

It is not a de Polignac number, because 99943785 - 2⁹ = 99943273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1110442 + ... + 1110531.

It is an arithmetic number, because the mean of its divisors is an integer number (14436331).

Almost surely, 2^99943785 is an apocalyptic number.

It is an amenable number.

99943785 is a deficient number, since it is larger than the sum of its proper divisors (73292187).

99943785 is a wasteful number, since it uses less digits than its factorization.

99943785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220984 (or 2220981 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 99943785 is about 9997.1888548732. The cubic root of 99943785 is about 464.0718914196.

The spelling of 99943785 in words is "ninety-nine million, nine hundred forty-three thousand, seven hundred eighty-five".