72160133 has 4 divisors (see below), whose sum is σ = 73343148. Its totient is φ = 70977120.

The previous prime is 72160129. The next prime is 72160141. The reversal of 72160133 is 33106127.

It is a happy number.

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 20994724 + 51165409 = 4582^2 + 7153^2 .

It is a cyclic number.

It is not a de Polignac number, because 72160133 - 2² = 72160129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72160099 and 72160108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72160103) 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, 591416 + ... + 591537.

It is an arithmetic number, because the mean of its divisors is an integer number (18335787).

Almost surely, 2^72160133 is an apocalyptic number.

It is an amenable number.

72160133 is a deficient number, since it is larger than the sum of its proper divisors (1183015).

72160133 is a wasteful number, since it uses less digits than its factorization.

72160133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183014.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 72160133 is about 8494.7120610413. The cubic root of 72160133 is about 416.3249529706.

The spelling of 72160133 in words is "seventy-two million, one hundred sixty thousand, one hundred thirty-three".