73645133 has 8 divisors (see below), whose sum is σ = 76034808. Its totient is φ = 71276544.

The previous prime is 73645129. The next prime is 73645219. The reversal of 73645133 is 33154637.

It can be written as a sum of positive squares in 4 ways, for example, as 13380964 + 60264169 = 3658^2 + 7763^2 .

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 73645133 - 2² = 73645129 is a prime.

It is a super-2 number, since 2×73645133² = 10847211229175378, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73645133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73645633) 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, 1985 + ... + 12297.

It is an arithmetic number, because the mean of its divisors is an integer number (9504351).

Almost surely, 2^73645133 is an apocalyptic number.

It is an amenable number.

73645133 is a deficient number, since it is larger than the sum of its proper divisors (2389675).

73645133 is a wasteful number, since it uses less digits than its factorization.

73645133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10543.

The product of its digits is 22680, while the sum is 32.

The square root of 73645133 is about 8581.6742538971. The cubic root of 73645133 is about 419.1614656716.

The spelling of 73645133 in words is "seventy-three million, six hundred forty-five thousand, one hundred thirty-three".