133138137 has 8 divisors (see below), whose sum is σ = 193655520. Its totient is φ = 80689760.

The previous prime is 133138133. The next prime is 133138141. The reversal of 133138137 is 731831331.

It is an interprime number because it is at equal distance from previous prime (133138133) and next prime (133138141).

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 133138137 - 2² = 133138133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133138133) 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, 2017212 + ... + 2017277.

It is an arithmetic number, because the mean of its divisors is an integer number (24206940).

Almost surely, 2^133138137 is an apocalyptic number.

It is an amenable number.

133138137 is a deficient number, since it is larger than the sum of its proper divisors (60517383).

133138137 is a wasteful number, since it uses less digits than its factorization.

133138137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034503.

The product of its digits is 4536, while the sum is 30.

The square root of 133138137 is about 11538.5500388914. The cubic root of 133138137 is about 510.6235318542.

Adding to 133138137 its reverse (731831331), we get a palindrome (864969468).

The spelling of 133138137 in words is "one hundred thirty-three million, one hundred thirty-eight thousand, one hundred thirty-seven".