133939616 has 12 divisors (see below), whose sum is σ = 263693682. Its totient is φ = 66969792.

The previous prime is 133939609. The next prime is 133939627. The reversal of 133939616 is 616939331.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 125529616 + 8410000 = 11204^2 + 2900^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2092775 + ... + 2092838.

Almost surely, 2^133939616 is an apocalyptic number.

133939616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133939616 is a deficient number, since it is larger than the sum of its proper divisors (129754066).

133939616 is an equidigital number, since it uses as much as digits as its factorization.

133939616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185623 (or 4185615 counting only the distinct ones).

The product of its digits is 78732, while the sum is 41.

The square root of 133939616 is about 11573.2284173432. The cubic root of 133939616 is about 511.6461177660.

The spelling of 133939616 in words is "one hundred thirty-three million, nine hundred thirty-nine thousand, six hundred sixteen".