133663817 has 24 divisors (see below), whose sum is σ = 160395264. Its totient is φ = 111004992.

The previous prime is 133663807. The next prime is 133663837. The reversal of 133663817 is 718366331.

It is not a de Polignac number, because 133663817 - 2⁴ = 133663801 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 (133663807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 292253 + ... + 292709.

It is an arithmetic number, because the mean of its divisors is an integer number (6683136).

Almost surely, 2^133663817 is an apocalyptic number.

It is an amenable number.

133663817 is a deficient number, since it is larger than the sum of its proper divisors (26731447).

133663817 is a wasteful number, since it uses less digits than its factorization.

133663817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 638 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 133663817 is about 11561.3068897941. The cubic root of 133663817 is about 511.2946945939.

The spelling of 133663817 in words is "one hundred thirty-three million, six hundred sixty-three thousand, eight hundred seventeen".