133561738 has 8 divisors (see below), whose sum is σ = 200398788. Its totient is φ = 66762144.

The previous prime is 133561699. The next prime is 133561763. The reversal of 133561738 is 837165331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 94536729 + 39025009 = 9723^2 + 6247^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 133561697 and 133561706.

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 3 ways as a sum of consecutive naturals, for example, 2620 + ... + 16552.

Almost surely, 2^133561738 is an apocalyptic number.

133561738 is a deficient number, since it is larger than the sum of its proper divisors (66837050).

133561738 is a wasteful number, since it uses less digits than its factorization.

133561738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18728.

The product of its digits is 45360, while the sum is 37.

The square root of 133561738 is about 11556.8913640304. The cubic root of 133561738 is about 511.1645029325.

The spelling of 133561738 in words is "one hundred thirty-three million, five hundred sixty-one thousand, seven hundred thirty-eight".