72736081 has 8 divisors (see below), whose sum is σ = 84016224. Its totient is φ = 62233920.

The previous prime is 72736073. The next prime is 72736121. The reversal of 72736081 is 18063727.

72736081 is nontrivially palindromic in base 2.

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 72736081 - 2³ = 72736073 is a prime.

It is a super-2 number, since 2×72736081² = 10581074958477122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72736061) 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, 194295 + ... + 194668.

It is an arithmetic number, because the mean of its divisors is an integer number (10502028).

Almost surely, 2^72736081 is an apocalyptic number.

It is an amenable number.

72736081 is a deficient number, since it is larger than the sum of its proper divisors (11280143).

72736081 is a wasteful number, since it uses less digits than its factorization.

72736081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388991.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 72736081 is about 8528.5450693539. The cubic root of 72736081 is about 417.4296552811.

The spelling of 72736081 in words is "seventy-two million, seven hundred thirty-six thousand, eighty-one".