133663639 has 16 divisors (see below), whose sum is σ = 147549600. Its totient is φ = 120515584.

The previous prime is 133663631. The next prime is 133663643. The reversal of 133663639 is 936366331.

It is a happy number.

It is not a de Polignac number, because 133663639 - 2³ = 133663631 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 (133663631) 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 15 ways as a sum of consecutive naturals, for example, 66552 + ... + 68530.

It is an arithmetic number, because the mean of its divisors is an integer number (9221850).

Almost surely, 2^133663639 is an apocalyptic number.

133663639 is a deficient number, since it is larger than the sum of its proper divisors (13885961).

133663639 is a wasteful number, since it uses less digits than its factorization.

133663639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its digits is 157464, while the sum is 40.

The square root of 133663639 is about 11561.2991916999. The cubic root of 133663639 is about 511.2944676302.

The spelling of 133663639 in words is "one hundred thirty-three million, six hundred sixty-three thousand, six hundred thirty-nine".