133371613 has 4 divisors (see below), whose sum is σ = 141217020. Its totient is φ = 125526208.

The previous prime is 133371599. The next prime is 133371631. The reversal of 133371613 is 316173331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60559524 + 72812089 = 7782^2 + 8533^2 .

It is a cyclic number.

It is not a de Polignac number, because 133371613 - 2²¹ = 131274461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133371673) 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, 3922678 + ... + 3922711.

It is an arithmetic number, because the mean of its divisors is an integer number (35304255).

Almost surely, 2^133371613 is an apocalyptic number.

It is an amenable number.

133371613 is a deficient number, since it is larger than the sum of its proper divisors (7845407).

133371613 is an equidigital number, since it uses as much as digits as its factorization.

133371613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7845406.

The product of its digits is 3402, while the sum is 28.

The square root of 133371613 is about 11548.6628230285. The cubic root of 133371613 is about 510.9218403671.

The spelling of 133371613 in words is "one hundred thirty-three million, three hundred seventy-one thousand, six hundred thirteen".