133988011 has 4 divisors (see below), whose sum is σ = 134011312. Its totient is φ = 133964712.

The previous prime is 133988009. The next prime is 133988017. The reversal of 133988011 is 110889331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 133988011 - 2¹ = 133988009 is a prime.

It is a super-2 number, since 2×133988011² = 35905574183472242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133988017) 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, 3850 + ... + 16816.

It is an arithmetic number, because the mean of its divisors is an integer number (33502828).

Almost surely, 2^133988011 is an apocalyptic number.

133988011 is a deficient number, since it is larger than the sum of its proper divisors (23301).

133988011 is a wasteful number, since it uses less digits than its factorization.

133988011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23300.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 133988011 is about 11575.3190452791. The cubic root of 133988011 is about 511.7077329251.

The spelling of 133988011 in words is "one hundred thirty-three million, nine hundred eighty-eight thousand, eleven".