133661361 has 8 divisors (see below), whose sum is σ = 188698464. Its totient is φ = 83865920.

The previous prime is 133661347. The next prime is 133661369. The reversal of 133661361 is 163166331.

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

It is a cyclic number.

It is not a de Polignac number, because 133661361 - 2¹⁴ = 133644977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133661369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310355 + ... + 1310456.

It is an arithmetic number, because the mean of its divisors is an integer number (23587308).

Almost surely, 2^133661361 is an apocalyptic number.

It is an amenable number.

133661361 is a deficient number, since it is larger than the sum of its proper divisors (55037103).

133661361 is a wasteful number, since it uses less digits than its factorization.

133661361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620831.

The product of its digits is 5832, while the sum is 30.

The square root of 133661361 is about 11561.2006729405. The cubic root of 133661361 is about 511.2915629873.

The spelling of 133661361 in words is "one hundred thirty-three million, six hundred sixty-one thousand, three hundred sixty-one".