133888873 has 2 divisors, whose sum is σ = 133888874. Its totient is φ = 133888872.

The previous prime is 133888871. The next prime is 133888879. The reversal of 133888873 is 378888331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110733529 + 23155344 = 10523^2 + 4812^2 .

It is an emirp because it is prime and its reverse (378888331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133888873 - 2¹ = 133888871 is a prime.

Together with 133888871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (133888871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66944436 + 66944437.

It is an arithmetic number, because the mean of its divisors is an integer number (66944437).

Almost surely, 2^133888873 is an apocalyptic number.

It is an amenable number.

133888873 is a deficient number, since it is larger than the sum of its proper divisors (1).

133888873 is an equidigital number, since it uses as much as digits as its factorization.

133888873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 49.

The square root of 133888873 is about 11571.0359518930. The cubic root of 133888873 is about 511.5814972576.

The spelling of 133888873 in words is "one hundred thirty-three million, eight hundred eighty-eight thousand, eight hundred seventy-three".