133638299 has 4 divisors (see below), whose sum is σ = 134316864. Its totient is φ = 132959736.

The previous prime is 133638269. The next prime is 133638301. The reversal of 133638299 is 992836331.

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

It is a cyclic number.

It is not a de Polignac number, because 133638299 - 2²⁴ = 116861083 is a prime.

It is a super-2 number, since 2×133638299² = 35718389919226802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133638269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338987 + ... + 339380.

It is an arithmetic number, because the mean of its divisors is an integer number (33579216).

Almost surely, 2^133638299 is an apocalyptic number.

133638299 is a deficient number, since it is larger than the sum of its proper divisors (678565).

133638299 is an equidigital number, since it uses as much as digits as its factorization.

133638299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678564.

The product of its digits is 209952, while the sum is 44.

The square root of 133638299 is about 11560.2032421580. The cubic root of 133638299 is about 511.2621551261.

The spelling of 133638299 in words is "one hundred thirty-three million, six hundred thirty-eight thousand, two hundred ninety-nine".