133397371 has 12 divisors (see below), whose sum is σ = 139051776. Its totient is φ = 127960560.

The previous prime is 133397357. The next prime is 133397389. The reversal of 133397371 is 173793331.

It is not a de Polignac number, because 133397371 - 2²¹ = 131300219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133397371.

It is not an unprimeable number, because it can be changed into a prime (134397371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121501 + ... + 122593.

It is an arithmetic number, because the mean of its divisors is an integer number (11587648).

Almost surely, 2^133397371 is an apocalyptic number.

133397371 is a deficient number, since it is larger than the sum of its proper divisors (5654405).

133397371 is a wasteful number, since it uses less digits than its factorization.

133397371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282 (or 1251 counting only the distinct ones).

The product of its digits is 35721, while the sum is 37.

The square root of 133397371 is about 11549.7779632338. Note that the first 3 decimals coincide. The cubic root of 133397371 is about 510.9547296188.

The spelling of 133397371 in words is "one hundred thirty-three million, three hundred ninety-seven thousand, three hundred seventy-one".