99753985 has 4 divisors (see below), whose sum is σ = 119704788. Its totient is φ = 79803184.

The previous prime is 99753949. The next prime is 99753991. The reversal of 99753985 is 58935799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58935799 = 13 ⋅4533523.

It can be written as a sum of positive squares in 2 ways, for example, as 51437584 + 48316401 = 7172^2 + 6951^2 .

It is a cyclic number.

It is not a de Polignac number, because 99753985 - 2²³ = 91365377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9975394 + ... + 9975403.

It is an arithmetic number, because the mean of its divisors is an integer number (29926197).

Almost surely, 2^99753985 is an apocalyptic number.

It is an amenable number.

99753985 is a deficient number, since it is larger than the sum of its proper divisors (19950803).

99753985 is a wasteful number, since it uses less digits than its factorization.

99753985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19950802.

The product of its digits is 3061800, while the sum is 55.

The square root of 99753985 is about 9987.6916752571. The cubic root of 99753985 is about 463.7779373032. Note that the first 3 decimals are identical.

The spelling of 99753985 in words is "ninety-nine million, seven hundred fifty-three thousand, nine hundred eighty-five".