99505601 has 4 divisors (see below), whose sum is σ = 107159892. Its totient is φ = 91851312.

The previous prime is 99505597. The next prime is 99505619. The reversal of 99505601 is 10650599.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35521600 + 63984001 = 5960^2 + 7999^2 .

It is a cyclic number.

It is not a de Polignac number, because 99505601 - 2² = 99505597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99505001) 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, 3827126 + ... + 3827151.

It is an arithmetic number, because the mean of its divisors is an integer number (26789973).

Almost surely, 2^99505601 is an apocalyptic number.

It is an amenable number.

99505601 is a deficient number, since it is larger than the sum of its proper divisors (7654291).

99505601 is a wasteful number, since it uses less digits than its factorization.

99505601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7654290.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 99505601 is about 9975.2494204406. The cubic root of 99505601 is about 463.3926869889.

It can be divided in two parts, 9950 and 5601, that added together give a palindrome (15551).

The spelling of 99505601 in words is "ninety-nine million, five hundred five thousand, six hundred one".