133371965 has 4 divisors (see below), whose sum is σ = 160046364. Its totient is φ = 106697568.

The previous prime is 133371961. The next prime is 133371977. The reversal of 133371965 is 569173331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569173331 = 37 ⋅15383063.

It can be written as a sum of positive squares in 2 ways, for example, as 71182969 + 62188996 = 8437^2 + 7886^2 .

It is a cyclic number.

It is not a de Polignac number, because 133371965 - 2² = 133371961 is a prime.

It is a super-2 number, since 2×133371965² = 35576162095922450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133371961) 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, 13337192 + ... + 13337201.

It is an arithmetic number, because the mean of its divisors is an integer number (40011591).

Almost surely, 2^133371965 is an apocalyptic number.

It is an amenable number.

133371965 is a deficient number, since it is larger than the sum of its proper divisors (26674399).

133371965 is an equidigital number, since it uses as much as digits as its factorization.

133371965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26674398.

The product of its digits is 51030, while the sum is 38.

The square root of 133371965 is about 11548.6780628780. The cubic root of 133371965 is about 510.9222898489.

The spelling of 133371965 in words is "one hundred thirty-three million, three hundred seventy-one thousand, nine hundred sixty-five".