133639739 has 8 divisors (see below), whose sum is σ = 134913600. Its totient is φ = 132371200.

The previous prime is 133639733. The next prime is 133639757. The reversal of 133639739 is 937936331.

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

It is a cyclic number.

It is not a de Polignac number, because 133639739 - 2¹² = 133635643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133639739.

It is not an unprimeable number, because it can be changed into a prime (133639733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63179 + ... + 65259.

It is an arithmetic number, because the mean of its divisors is an integer number (16864200).

Almost surely, 2^133639739 is an apocalyptic number.

133639739 is a deficient number, since it is larger than the sum of its proper divisors (1273861).

133639739 is a wasteful number, since it uses less digits than its factorization.

133639739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661.

The product of its digits is 275562, while the sum is 44.

The square root of 133639739 is about 11560.2655246322. The cubic root of 133639739 is about 511.2639914631.

The spelling of 133639739 in words is "one hundred thirty-three million, six hundred thirty-nine thousand, seven hundred thirty-nine".