133340639 has 4 divisors (see below), whose sum is σ = 141184224. Its totient is φ = 125497056.

The previous prime is 133340629. The next prime is 133340657. The reversal of 133340639 is 936043331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133340639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133340609) 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, 3921767 + ... + 3921800.

It is an arithmetic number, because the mean of its divisors is an integer number (35296056).

Almost surely, 2^133340639 is an apocalyptic number.

133340639 is a deficient number, since it is larger than the sum of its proper divisors (7843585).

133340639 is an equidigital number, since it uses as much as digits as its factorization.

133340639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843584.

The product of its (nonzero) digits is 17496, while the sum is 32.

The square root of 133340639 is about 11547.3217241056. The cubic root of 133340639 is about 510.8822854274.

The spelling of 133340639 in words is "one hundred thirty-three million, three hundred forty thousand, six hundred thirty-nine".