133988111 has 2 divisors, whose sum is σ = 133988112. Its totient is φ = 133988110.

The previous prime is 133988053. The next prime is 133988131. The reversal of 133988111 is 111889331.

It is a strong prime.

It is an emirp because it is prime and its reverse (111889331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133988111 - 2¹⁸ = 133725967 is a prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133988131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66994055 + 66994056.

It is an arithmetic number, because the mean of its divisors is an integer number (66994056).

Almost surely, 2^133988111 is an apocalyptic number.

133988111 is a deficient number, since it is larger than the sum of its proper divisors (1).

133988111 is an equidigital number, since it uses as much as digits as its factorization.

133988111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 35.

The square root of 133988111 is about 11575.3233648136. The cubic root of 133988111 is about 511.7078602270.

The spelling of 133988111 in words is "one hundred thirty-three million, nine hundred eighty-eight thousand, one hundred eleven".