133911965 has 8 divisors (see below), whose sum is σ = 175303008. Its totient is φ = 97390480.

The previous prime is 133911949. The next prime is 133911979. The reversal of 133911965 is 569119331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133911965 - 2⁴ = 133911949 is a prime.

It is a super-2 number, since 2×133911965² = 35864828740322450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1217327 + ... + 1217436.

It is an arithmetic number, because the mean of its divisors is an integer number (21912876).

Almost surely, 2^133911965 is an apocalyptic number.

It is an amenable number.

133911965 is a deficient number, since it is larger than the sum of its proper divisors (41391043).

133911965 is a wasteful number, since it uses less digits than its factorization.

133911965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434779.

The product of its digits is 21870, while the sum is 38.

The square root of 133911965 is about 11572.0337451979. The cubic root of 133911965 is about 511.6109066242.

The spelling of 133911965 in words is "one hundred thirty-three million, nine hundred eleven thousand, nine hundred sixty-five".