72685529 has 8 divisors (see below), whose sum is σ = 83724288. Its totient is φ = 61810560.

The previous prime is 72685517. The next prime is 72685531. The reversal of 72685529 is 92558627.

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

It is a de Polignac number, because none of the positive numbers 2^k-72685529 is a prime.

It is a super-2 number, since 2×72685529² = 10566372252019682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72685529.

It is not an unprimeable number, because it can be changed into a prime (72685429) 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, 39992 + ... + 41769.

It is an arithmetic number, because the mean of its divisors is an integer number (10465536).

Almost surely, 2^72685529 is an apocalyptic number.

It is an amenable number.

72685529 is a deficient number, since it is larger than the sum of its proper divisors (11038759).

72685529 is a wasteful number, since it uses less digits than its factorization.

72685529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81895.

The product of its digits is 302400, while the sum is 44.

The square root of 72685529 is about 8525.5808599766. The cubic root of 72685529 is about 417.3329275215.

The spelling of 72685529 in words is "seventy-two million, six hundred eighty-five thousand, five hundred twenty-nine".