133238897 has 16 divisors (see below), whose sum is σ = 150258240. Its totient is φ = 117096000.

The previous prime is 133238893. The next prime is 133238923. The reversal of 133238897 is 798832331.

It is a cyclic number.

It is not a de Polignac number, because 133238897 - 2² = 133238893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133238893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46379 + ... + 49167.

It is an arithmetic number, because the mean of its divisors is an integer number (9391140).

Almost surely, 2^133238897 is an apocalyptic number.

It is an amenable number.

133238897 is a deficient number, since it is larger than the sum of its proper divisors (17019343).

133238897 is a wasteful number, since it uses less digits than its factorization.

133238897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944.

The product of its digits is 217728, while the sum is 44.

The square root of 133238897 is about 11542.9154462813. The cubic root of 133238897 is about 510.7523140207.

The spelling of 133238897 in words is "one hundred thirty-three million, two hundred thirty-eight thousand, eight hundred ninety-seven".