72134933 has 4 divisors (see below), whose sum is σ = 77683788. Its totient is φ = 66586080.

The previous prime is 72134929. The next prime is 72134939. The reversal of 72134933 is 33943127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17123044 + 55011889 = 4138^2 + 7417^2 .

It is a cyclic number.

It is not a de Polignac number, because 72134933 - 2² = 72134929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72134933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72134939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2774408 + ... + 2774433.

It is an arithmetic number, because the mean of its divisors is an integer number (19420947).

Almost surely, 2^72134933 is an apocalyptic number.

It is an amenable number.

72134933 is a deficient number, since it is larger than the sum of its proper divisors (5548855).

72134933 is a wasteful number, since it uses less digits than its factorization.

72134933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5548854.

The product of its digits is 13608, while the sum is 32.

The square root of 72134933 is about 8493.2286558175. The cubic root of 72134933 is about 416.2764838696.

The spelling of 72134933 in words is "seventy-two million, one hundred thirty-four thousand, nine hundred thirty-three".