72389517 has 8 divisors (see below), whose sum is σ = 97741440. Its totient is φ = 47648640.

The previous prime is 72389503. The next prime is 72389531. The reversal of 72389517 is 71598327.

It is an interprime number because it is at equal distance from previous prime (72389503) and next prime (72389531).

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

It is not a de Polignac number, because 72389517 - 2⁶ = 72389453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72389617) 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 7 ways as a sum of consecutive naturals, for example, 152484 + ... + 152957.

It is an arithmetic number, because the mean of its divisors is an integer number (12217680).

Almost surely, 2^72389517 is an apocalyptic number.

It is an amenable number.

72389517 is a deficient number, since it is larger than the sum of its proper divisors (25351923).

72389517 is a wasteful number, since it uses less digits than its factorization.

72389517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305523.

The product of its digits is 105840, while the sum is 42.

The square root of 72389517 is about 8508.2029242373. The cubic root of 72389517 is about 416.7656269124.

The spelling of 72389517 in words is "seventy-two million, three hundred eighty-nine thousand, five hundred seventeen".