72113279 has 8 divisors (see below), whose sum is σ = 84332160. Its totient is φ = 60373656.

The previous prime is 72113243. The next prime is 72113297. The reversal of 72113279 is 97231127.

Added to its reverse (97231127) it gives a triangular number (169344406 = T₁₈₄₀₃).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72113279 - 2¹⁶ = 72047743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72113299) 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, 119489 + ... + 120090.

It is an arithmetic number, because the mean of its divisors is an integer number (10541520).

Almost surely, 2^72113279 is an apocalyptic number.

72113279 is a deficient number, since it is larger than the sum of its proper divisors (12218881).

72113279 is a wasteful number, since it uses less digits than its factorization.

72113279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239629.

The product of its digits is 5292, while the sum is 32.

The square root of 72113279 is about 8491.9537799025. The cubic root of 72113279 is about 416.2348260452.

Adding to 72113279 its reverse (97231127), we get a triangular number (169344406 = T₁₈₄₀₃).

The spelling of 72113279 in words is "seventy-two million, one hundred thirteen thousand, two hundred seventy-nine".