72488917 has 4 divisors (see below), whose sum is σ = 73010560. Its totient is φ = 71967276.

The previous prime is 72488873. The next prime is 72488929. The reversal of 72488917 is 71988427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72488917 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 (72480917) 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 3 ways as a sum of consecutive naturals, for example, 260613 + ... + 260890.

It is an arithmetic number, because the mean of its divisors is an integer number (18252640).

Almost surely, 2^72488917 is an apocalyptic number.

It is an amenable number.

72488917 is a deficient number, since it is larger than the sum of its proper divisors (521643).

72488917 is a wasteful number, since it uses less digits than its factorization.

72488917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521642.

The product of its digits is 225792, while the sum is 46.

The square root of 72488917 is about 8514.0423419196. The cubic root of 72488917 is about 416.9562970453.

The spelling of 72488917 in words is "seventy-two million, four hundred eighty-eight thousand, nine hundred seventeen".