9911001 has 4 divisors (see below), whose sum is σ = 13214672. Its totient is φ = 6607332.

The previous prime is 9910993. The next prime is 9911009. The reversal of 9911001 is 1001199.

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 an interprime number because it is at equal distance from previous prime (9910993) and next prime (9911009).

It is not a de Polignac number, because 9911001 - 2³ = 9910993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9911009) 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, 1651831 + ... + 1651836.

It is an arithmetic number, because the mean of its divisors is an integer number (3303668).

Almost surely, 2^9911001 is an apocalyptic number.

It is an amenable number.

9911001 is a deficient number, since it is larger than the sum of its proper divisors (3303671).

9911001 is a wasteful number, since it uses less digits than its factorization.

9911001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303670.

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

The square root of 9911001 is about 3148.1742327895. The cubic root of 9911001 is about 214.8024216963.

The spelling of 9911001 in words is "nine million, nine hundred eleven thousand, one".