133394386 has 4 divisors (see below), whose sum is σ = 200091582. Its totient is φ = 66697192.

The previous prime is 133394381. The next prime is 133394399. The reversal of 133394386 is 683493331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 86211225 + 47183161 = 9285^2 + 6869^2 .

It is not an unprimeable number, because it can be changed into a prime (133394381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33348595 + ... + 33348598.

Almost surely, 2^133394386 is an apocalyptic number.

133394386 is a deficient number, since it is larger than the sum of its proper divisors (66697196).

133394386 is an equidigital number, since it uses as much as digits as its factorization.

133394386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66697195.

The product of its digits is 139968, while the sum is 40.

The square root of 133394386 is about 11549.6487392474. The cubic root of 133394386 is about 510.9509184211.

The spelling of 133394386 in words is "one hundred thirty-three million, three hundred ninety-four thousand, three hundred eighty-six".