133436939 has 4 divisors (see below), whose sum is σ = 133649040. Its totient is φ = 133224840.

The previous prime is 133436921. The next prime is 133436959. The reversal of 133436939 is 939634331.

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 133436939 - 2⁸ = 133436683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133436896 and 133436905.

It is not an unprimeable number, because it can be changed into a prime (133436909) 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, 105104 + ... + 106365.

It is an arithmetic number, because the mean of its divisors is an integer number (33412260).

Almost surely, 2^133436939 is an apocalyptic number.

133436939 is a deficient number, since it is larger than the sum of its proper divisors (212101).

133436939 is an equidigital number, since it uses as much as digits as its factorization.

133436939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212100.

The product of its digits is 157464, while the sum is 41.

The square root of 133436939 is about 11551.4907695933. The cubic root of 133436939 is about 511.0052440029.

The spelling of 133436939 in words is "one hundred thirty-three million, four hundred thirty-six thousand, nine hundred thirty-nine".