99011001 has 8 divisors (see below), whose sum is σ = 135582784. Its totient is φ = 64223280.

The previous prime is 99010997. The next prime is 99011039. The reversal of 99011001 is 10011099.

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

It is not a de Polignac number, because 99011001 - 2² = 99010997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99011041) 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, 445885 + ... + 446106.

It is an arithmetic number, because the mean of its divisors is an integer number (16947848).

Almost surely, 2^99011001 is an apocalyptic number.

It is an amenable number.

99011001 is a deficient number, since it is larger than the sum of its proper divisors (36571783).

99011001 is a wasteful number, since it uses less digits than its factorization.

99011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892031.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 99011001 is about 9950.4271767598. The cubic root of 99011001 is about 462.6236354153.

The spelling of 99011001 in words is "ninety-nine million, eleven thousand, one".