99653605 has 4 divisors (see below), whose sum is σ = 119584332. Its totient is φ = 79722880.

The previous prime is 99653579. The next prime is 99653611. The reversal of 99653605 is 50635699.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50635699 = 179 ⋅282881.

It can be written as a sum of positive squares in 2 ways, for example, as 14386849 + 85266756 = 3793^2 + 9234^2 .

It is not a de Polignac number, because 99653605 - 2⁵ = 99653573 is a prime.

It is a Duffinian number.

It is a congruent 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, 9965356 + ... + 9965365.

It is an arithmetic number, because the mean of its divisors is an integer number (29896083).

Almost surely, 2^99653605 is an apocalyptic number.

It is an amenable number.

99653605 is a deficient number, since it is larger than the sum of its proper divisors (19930727).

99653605 is a wasteful number, since it uses less digits than its factorization.

99653605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19930726.

The product of its (nonzero) digits is 218700, while the sum is 43.

The square root of 99653605 is about 9982.6652252793. The cubic root of 99653605 is about 463.6223222886.

The spelling of 99653605 in words is "ninety-nine million, six hundred fifty-three thousand, six hundred five".