133955641 has 4 divisors (see below), whose sum is σ = 134378532. Its totient is φ = 133532752.

The previous prime is 133955617. The next prime is 133955683. The reversal of 133955641 is 146559331.

It is a happy number.

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 6175225 + 127780416 = 2485^2 + 11304^2 .

It is a cyclic number.

It is not a de Polignac number, because 133955641 - 2⁷ = 133955513 is a prime.

It is a super-2 number, since 2×133955641² = 35888227511441762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133955641.

It is not an unprimeable number, because it can be changed into a prime (133955741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210970 + ... + 211603.

It is an arithmetic number, because the mean of its divisors is an integer number (33594633).

Almost surely, 2^133955641 is an apocalyptic number.

It is an amenable number.

133955641 is a deficient number, since it is larger than the sum of its proper divisors (422891).

133955641 is an equidigital number, since it uses as much as digits as its factorization.

133955641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422890.

The product of its digits is 48600, while the sum is 37.

The square root of 133955641 is about 11573.9207272212. The cubic root of 133955641 is about 511.6665219908. Note that the first 3 decimals are identical.

The spelling of 133955641 in words is "one hundred thirty-three million, nine hundred fifty-five thousand, six hundred forty-one".