99603865 has 8 divisors (see below), whose sum is σ = 119697480. Its totient is φ = 79567872.

The previous prime is 99603863. The next prime is 99603913. The reversal of 99603865 is 56830699.

It can be written as a sum of positive squares in 4 ways, for example, as 6365529 + 93238336 = 2523^2 + 9656^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 99603865 - 2¹ = 99603863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99603863) 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, 10504 + ... + 17593.

It is an arithmetic number, because the mean of its divisors is an integer number (14962185).

Almost surely, 2^99603865 is an apocalyptic number.

It is an amenable number.

99603865 is a deficient number, since it is larger than the sum of its proper divisors (20093615).

99603865 is a wasteful number, since it uses less digits than its factorization.

99603865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28811.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 99603865 is about 9980.1735956846. The cubic root of 99603865 is about 463.5451736760.

The spelling of 99603865 in words is "ninety-nine million, six hundred three thousand, eight hundred sixty-five".