133238901 has 16 divisors (see below), whose sum is σ = 179349120. Its totient is φ = 87982080.

The previous prime is 133238893. The next prime is 133238923. The reversal of 133238901 is 109832331.

It is not a de Polignac number, because 133238901 - 2³ = 133238893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133238981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207541 + ... + 208181.

It is an arithmetic number, because the mean of its divisors is an integer number (11209320).

Almost surely, 2^133238901 is an apocalyptic number.

It is an amenable number.

133238901 is a deficient number, since it is larger than the sum of its proper divisors (46110219).

133238901 is a wasteful number, since it uses less digits than its factorization.

133238901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 133238901 is about 11542.9156195478. The cubic root of 133238901 is about 510.7523191318.

The spelling of 133238901 in words is "one hundred thirty-three million, two hundred thirty-eight thousand, nine hundred one".