72309269 has 8 divisors (see below), whose sum is σ = 76452000. Its totient is φ = 68200272.

The previous prime is 72309257. The next prime is 72309271. The reversal of 72309269 is 96290327.

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

It is not a de Polignac number, because 72309269 - 2²⁴ = 55532053 is a prime.

It is a super-3 number, since 3×72309269³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72309299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3959 + ... + 12660.

It is an arithmetic number, because the mean of its divisors is an integer number (9556500).

Almost surely, 2^72309269 is an apocalyptic number.

It is an amenable number.

72309269 is a deficient number, since it is larger than the sum of its proper divisors (4142731).

72309269 is a wasteful number, since it uses less digits than its factorization.

72309269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16867.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 72309269 is about 8503.4856970539. The cubic root of 72309269 is about 416.6115669718.

The spelling of 72309269 in words is "seventy-two million, three hundred nine thousand, two hundred sixty-nine".