11991002 has 8 divisors (see below), whose sum is σ = 18002196. Its totient is φ = 5990272.

The previous prime is 11990999. The next prime is 11991011. The reversal of 11991002 is 20019911.

It can be written as a sum of positive squares in 2 ways, for example, as 9554281 + 2436721 = 3091^2 + 1561^2 .

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

It is a super-3 number, since 3×11991002³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628 + ... + 5160.

Almost surely, 2^11991002 is an apocalyptic number.

11991002 is a deficient number, since it is larger than the sum of its proper divisors (6011194).

11991002 is a wasteful number, since it uses less digits than its factorization.

11991002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5232.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 11991002 is about 3462.8026221545. The cubic root of 11991002 is about 228.8856112091.

The spelling of 11991002 in words is "eleven million, nine hundred ninety-one thousand, two".