133957289 has 4 divisors (see below), whose sum is σ = 133994640. Its totient is φ = 133919940.

The previous prime is 133957283. The next prime is 133957303. The reversal of 133957289 is 982759331.

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 a de Polignac number, because none of the positive numbers 2^k-133957289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133957283) 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, 12647 + ... + 20684.

It is an arithmetic number, because the mean of its divisors is an integer number (33498660).

Almost surely, 2^133957289 is an apocalyptic number.

It is an amenable number.

133957289 is a deficient number, since it is larger than the sum of its proper divisors (37351).

133957289 is an equidigital number, since it uses as much as digits as its factorization.

133957289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37350.

The product of its digits is 408240, while the sum is 47.

The square root of 133957289 is about 11573.9919215455. The cubic root of 133957289 is about 511.6686202549.

The spelling of 133957289 in words is "one hundred thirty-three million, nine hundred fifty-seven thousand, two hundred eighty-nine".