72917347 has 4 divisors (see below), whose sum is σ = 74293200. Its totient is φ = 71541496.

The previous prime is 72917321. The next prime is 72917359. The reversal of 72917347 is 74371927.

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

It is a cyclic number.

It is not a de Polignac number, because 72917347 - 2¹¹ = 72915299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72915347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687847 + ... + 687952.

It is an arithmetic number, because the mean of its divisors is an integer number (18573300).

Almost surely, 2^72917347 is an apocalyptic number.

72917347 is a deficient number, since it is larger than the sum of its proper divisors (1375853).

72917347 is a wasteful number, since it uses less digits than its factorization.

72917347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375852.

The product of its digits is 74088, while the sum is 40.

The square root of 72917347 is about 8539.1654744477. The cubic root of 72917347 is about 417.7761272292.

The spelling of 72917347 in words is "seventy-two million, nine hundred seventeen thousand, three hundred forty-seven".