99505901 has 4 divisors (see below), whose sum is σ = 108551904. Its totient is φ = 90459900.

The previous prime is 99505891. The next prime is 99505943. The reversal of 99505901 is 10950599.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99505901 - 2⁶ = 99505837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 4522985 + ... + 4523006.

It is an arithmetic number, because the mean of its divisors is an integer number (27137976).

Almost surely, 2^99505901 is an apocalyptic number.

It is an amenable number.

99505901 is a deficient number, since it is larger than the sum of its proper divisors (9046003).

99505901 is a wasteful number, since it uses less digits than its factorization.

99505901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9046002.

The product of its (nonzero) digits is 18225, while the sum is 38.

The square root of 99505901 is about 9975.2644576472. The cubic root of 99505901 is about 463.3931526835.

It can be divided in two parts, 9950 and 5901, that added together give a palindrome (15851).

The spelling of 99505901 in words is "ninety-nine million, five hundred five thousand, nine hundred one".