72621133 has 8 divisors (see below), whose sum is σ = 80904600. Its totient is φ = 64723008.

The previous prime is 72621089. The next prime is 72621139. The reversal of 72621133 is 33112627.

It can be written as a sum of positive squares in 4 ways, for example, as 2010724 + 70610409 = 1418^2 + 8403^2 .

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 72621133 - 2⁹ = 72620621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72621098 and 72621107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72621139) 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 7 ways as a sum of consecutive naturals, for example, 95938 + ... + 96691.

It is an arithmetic number, because the mean of its divisors is an integer number (10113075).

Almost surely, 2^72621133 is an apocalyptic number.

It is an amenable number.

72621133 is a deficient number, since it is larger than the sum of its proper divisors (8283467).

72621133 is a wasteful number, since it uses less digits than its factorization.

72621133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192671.

The product of its digits is 1512, while the sum is 25.

The square root of 72621133 is about 8521.8033889547. The cubic root of 72621133 is about 417.2096452486.

The spelling of 72621133 in words is "seventy-two million, six hundred twenty-one thousand, one hundred thirty-three".