11998011 has 4 divisors (see below), whose sum is σ = 15997352. Its totient is φ = 7998672.

The previous prime is 11998009. The next prime is 11998013. The reversal of 11998011 is 11089911.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11998009) and next prime (11998013).

It is not a de Polignac number, because 11998011 - 2¹ = 11998009 is a prime.

It is a super-2 number, since 2×11998011² = 287904535912242, 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 11998011.

It is not an unprimeable number, because it can be changed into a prime (11998013) 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, 1999666 + ... + 1999671.

It is an arithmetic number, because the mean of its divisors is an integer number (3999338).

Almost surely, 2^11998011 is an apocalyptic number.

11998011 is a deficient number, since it is larger than the sum of its proper divisors (3999341).

11998011 is an equidigital number, since it uses as much as digits as its factorization.

11998011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999340.

The product of its (nonzero) digits is 648, while the sum is 30.

The square root of 11998011 is about 3463.8145158192. The cubic root of 11998011 is about 228.9301987194.

The spelling of 11998011 in words is "eleven million, nine hundred ninety-eight thousand, eleven".