72731069 has 8 divisors (see below), whose sum is σ = 77146080. Its totient is φ = 68374800.

The previous prime is 72731041. The next prime is 72731077. The reversal of 72731069 is 96013727.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72731069 is a prime.

It is a super-2 number, since 2×72731069² = 10579616795765522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72731669) 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, 12122 + ... + 17099.

It is an arithmetic number, because the mean of its divisors is an integer number (9643260).

Almost surely, 2^72731069 is an apocalyptic number.

It is an amenable number.

72731069 is a deficient number, since it is larger than the sum of its proper divisors (4415011).

72731069 is a wasteful number, since it uses less digits than its factorization.

72731069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29371.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 72731069 is about 8528.2512275378. The cubic root of 72731069 is about 417.4200671672.

The spelling of 72731069 in words is "seventy-two million, seven hundred thirty-one thousand, sixty-nine".