133656897 has 8 divisors (see below), whose sum is σ = 194410080. Its totient is φ = 81004160.

The previous prime is 133656883. The next prime is 133656961. The reversal of 133656897 is 798656331.

It is a happy number.

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 133656897 - 2⁸ = 133656641 is a prime.

It is a super-2 number, since 2×133656897² = 35728332231337218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133656827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2025072 + ... + 2025137.

It is an arithmetic number, because the mean of its divisors is an integer number (24301260).

Almost surely, 2^133656897 is an apocalyptic number.

It is an amenable number.

133656897 is a deficient number, since it is larger than the sum of its proper divisors (60753183).

133656897 is a wasteful number, since it uses less digits than its factorization.

133656897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050223.

The product of its digits is 816480, while the sum is 48.

The square root of 133656897 is about 11561.0076117958. The cubic root of 133656897 is about 511.2858709137.

The spelling of 133656897 in words is "one hundred thirty-three million, six hundred fifty-six thousand, eight hundred ninety-seven".