99911901 has 4 divisors (see below), whose sum is σ = 133215872. Its totient is φ = 66607932.

The previous prime is 99911897. The next prime is 99911921. The reversal of 99911901 is 10911999.

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 not a de Polignac number, because 99911901 - 2² = 99911897 is a prime.

It is a super-2 number, since 2×99911901² = 19964775922867602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99911901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99911921) 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, 16651981 + ... + 16651986.

It is an arithmetic number, because the mean of its divisors is an integer number (33303968).

Almost surely, 2^99911901 is an apocalyptic number.

It is an amenable number.

99911901 is a deficient number, since it is larger than the sum of its proper divisors (33303971).

99911901 is a wasteful number, since it uses less digits than its factorization.

99911901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33303970.

The product of its (nonzero) digits is 6561, while the sum is 39.

The square root of 99911901 is about 9995.5940793932. The cubic root of 99911901 is about 464.0225368686.

The spelling of 99911901 in words is "ninety-nine million, nine hundred eleven thousand, nine hundred one".