133668783 has 12 divisors (see below), whose sum is σ = 193361688. Its totient is φ = 88981200.

The previous prime is 133668737. The next prime is 133668791. The reversal of 133668783 is 387866331.

It is not a de Polignac number, because 133668783 - 2⁶ = 133668719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133668793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4285 + ... + 16902.

It is an arithmetic number, because the mean of its divisors is an integer number (16113474).

Almost surely, 2^133668783 is an apocalyptic number.

133668783 is a deficient number, since it is larger than the sum of its proper divisors (59692905).

133668783 is a wasteful number, since it uses less digits than its factorization.

133668783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21894 (or 21891 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 133668783 is about 11561.5216559067. The cubic root of 133668783 is about 511.3010265444.

The spelling of 133668783 in words is "one hundred thirty-three million, six hundred sixty-eight thousand, seven hundred eighty-three".