133867999 has 2 divisors, whose sum is σ = 133868000. Its totient is φ = 133867998.

The previous prime is 133867997. The next prime is 133868011. The reversal of 133867999 is 999768331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133867999 - 2¹ = 133867997 is a prime.

Together with 133867997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133867997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66933999 + 66934000.

It is an arithmetic number, because the mean of its divisors is an integer number (66934000).

Almost surely, 2^133867999 is an apocalyptic number.

133867999 is a deficient number, since it is larger than the sum of its proper divisors (1).

133867999 is an equidigital number, since it uses as much as digits as its factorization.

133867999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 55.

The square root of 133867999 is about 11570.1339231661. The cubic root of 133867999 is about 511.5549097677.

The spelling of 133867999 in words is "one hundred thirty-three million, eight hundred sixty-seven thousand, nine hundred ninety-nine".