133345439 has 8 divisors (see below), whose sum is σ = 143351040. Its totient is φ = 123638616.

The previous prime is 133345427. The next prime is 133345453. The reversal of 133345439 is 934543331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133345439 is a prime.

It is a super-2 number, since 2×133345439² = 35562012204205442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133345399 and 133345408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133345409) 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 7 ways as a sum of consecutive naturals, for example, 73769 + ... + 75554.

It is an arithmetic number, because the mean of its divisors is an integer number (17918880).

Almost surely, 2^133345439 is an apocalyptic number.

133345439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

133345439 is a deficient number, since it is larger than the sum of its proper divisors (10005601).

133345439 is a wasteful number, since it uses less digits than its factorization.

133345439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149389.

The product of its digits is 58320, while the sum is 35.

The square root of 133345439 is about 11547.5295626381. The cubic root of 133345439 is about 510.8884156054. Note that the first 3 decimals are identical.

The spelling of 133345439 in words is "one hundred thirty-three million, three hundred forty-five thousand, four hundred thirty-nine".