133539765 has 8 divisors (see below), whose sum is σ = 213663648. Its totient is φ = 71221200.

The previous prime is 133539691. The next prime is 133539793. The reversal of 133539765 is 567935331.

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

It is not a de Polignac number, because 133539765 - 2²¹ = 131442613 is a prime.

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, 4451311 + ... + 4451340.

It is an arithmetic number, because the mean of its divisors is an integer number (26707956).

Almost surely, 2^133539765 is an apocalyptic number.

133539765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133539765 is a deficient number, since it is larger than the sum of its proper divisors (80123883).

133539765 is an equidigital number, since it uses as much as digits as its factorization.

133539765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8902659.

The product of its digits is 255150, while the sum is 42.

The square root of 133539765 is about 11555.9406800139. The cubic root of 133539765 is about 511.1364698701.

The spelling of 133539765 in words is "one hundred thirty-three million, five hundred thirty-nine thousand, seven hundred sixty-five".