133189765 has 8 divisors (see below), whose sum is σ = 160050168. Its totient is φ = 106403520.

The previous prime is 133189723. The next prime is 133189787. The reversal of 133189765 is 567981331.

It can be written as a sum of positive squares in 4 ways, for example, as 67141636 + 66048129 = 8194^2 + 8127^2 .

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

It is not a de Polignac number, because 133189765 - 2⁹ = 133189253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14506 + ... + 21835.

It is an arithmetic number, because the mean of its divisors is an integer number (20006271).

Almost surely, 2^133189765 is an apocalyptic number.

It is an amenable number.

133189765 is a deficient number, since it is larger than the sum of its proper divisors (26860403).

133189765 is an equidigital number, since it uses as much as digits as its factorization.

133189765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37079.

The product of its digits is 136080, while the sum is 43.

The square root of 133189765 is about 11540.7870182237. The cubic root of 133189765 is about 510.6895261301.

The spelling of 133189765 in words is "one hundred thirty-three million, one hundred eighty-nine thousand, seven hundred sixty-five".