133563693 has 4 divisors (see below), whose sum is σ = 178084928. Its totient is φ = 89042460.

The previous prime is 133563653. The next prime is 133563697. The reversal of 133563693 is 396365331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 396365331 = 3 ⋅132121777.

It is not a de Polignac number, because 133563693 - 2¹⁰ = 133562669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133563697) 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, 22260613 + ... + 22260618.

It is an arithmetic number, because the mean of its divisors is an integer number (44521232).

Almost surely, 2^133563693 is an apocalyptic number.

It is an amenable number.

133563693 is a deficient number, since it is larger than the sum of its proper divisors (44521235).

133563693 is an equidigital number, since it uses as much as digits as its factorization.

133563693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44521234.

The product of its digits is 131220, while the sum is 39.

The square root of 133563693 is about 11556.9759452895. The cubic root of 133563693 is about 511.1669969644.

The spelling of 133563693 in words is "one hundred thirty-three million, five hundred sixty-three thousand, six hundred ninety-three".