72793279 has 4 divisors (see below), whose sum is σ = 78392776. Its totient is φ = 67193784.

The previous prime is 72793267. The next prime is 72793291. The reversal of 72793279 is 97239727.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (72793267) and next prime (72793291).

It is a cyclic number.

It is not a de Polignac number, because 72793279 - 2⁹ = 72792767 is a prime.

It is a super-2 number, since 2×72793279² = 10597722935143682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72793249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2799729 + ... + 2799754.

It is an arithmetic number, because the mean of its divisors is an integer number (19598194).

Almost surely, 2^72793279 is an apocalyptic number.

72793279 is a deficient number, since it is larger than the sum of its proper divisors (5599497).

72793279 is a wasteful number, since it uses less digits than its factorization.

72793279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5599496.

The product of its digits is 333396, while the sum is 46.

The square root of 72793279 is about 8531.8977373150. The cubic root of 72793279 is about 417.5390456747.

The spelling of 72793279 in words is "seventy-two million, seven hundred ninety-three thousand, two hundred seventy-nine".