72973717 has 8 divisors (see below), whose sum is σ = 73618272. Its totient is φ = 72332400.

The previous prime is 72973697. The next prime is 72973723. The reversal of 72973717 is 71737927.

It is a happy number.

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 72973717 - 2¹¹ = 72971669 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 (72973777) 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, 66342 + ... + 67432.

It is an arithmetic number, because the mean of its divisors is an integer number (9202284).

Almost surely, 2^72973717 is an apocalyptic number.

It is an amenable number.

72973717 is a deficient number, since it is larger than the sum of its proper divisors (644555).

72973717 is a wasteful number, since it uses less digits than its factorization.

72973717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619.

The product of its digits is 129654, while the sum is 43.

The square root of 72973717 is about 8542.4655106123. The cubic root of 72973717 is about 417.8837558218.

The spelling of 72973717 in words is "seventy-two million, nine hundred seventy-three thousand, seven hundred seventeen".