133993746 has 48 divisors (see below), whose sum is σ = 303264000. Its totient is φ = 42703584.

The previous prime is 133993733. The next prime is 133993747. The reversal of 133993746 is 647399331.

It is a happy number.

It is a super-2 number, since 2×133993746² = 35908647934225032, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133993747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54655 + ... + 57053.

It is an arithmetic number, because the mean of its divisors is an integer number (6318000).

Almost surely, 2^133993746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133993746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151632000).

133993746 is an abundant number, since it is smaller than the sum of its proper divisors (169270254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133993746 is a wasteful number, since it uses less digits than its factorization.

133993746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543 (or 2540 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 133993746 is about 11575.5667679816. The cubic root of 133993746 is about 511.7150335832.

The spelling of 133993746 in words is "one hundred thirty-three million, nine hundred ninety-three thousand, seven hundred forty-six".