133312393 has 4 divisors (see below), whose sum is σ = 139108608. Its totient is φ = 127516180.

The previous prime is 133312373. The next prime is 133312423. The reversal of 133312393 is 393213331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133312393 - 2¹³ = 133304201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133312343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2898073 + ... + 2898118.

It is an arithmetic number, because the mean of its divisors is an integer number (34777152).

Almost surely, 2^133312393 is an apocalyptic number.

It is an amenable number.

133312393 is a deficient number, since it is larger than the sum of its proper divisors (5796215).

133312393 is an equidigital number, since it uses as much as digits as its factorization.

133312393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796214.

The product of its digits is 4374, while the sum is 28.

The square root of 133312393 is about 11546.0986051566. The cubic root of 133312393 is about 510.8462089039.

The spelling of 133312393 in words is "one hundred thirty-three million, three hundred twelve thousand, three hundred ninety-three".