72727091 has 4 divisors (see below), whose sum is σ = 72956832. Its totient is φ = 72497352.

The previous prime is 72727073. The next prime is 72727097. The reversal of 72727091 is 19072727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19072727 = 23 ⋅829249.

It is a cyclic number.

It is not a de Polignac number, because 72727091 - 2⁶ = 72727027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72727097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114395 + ... + 115028.

It is an arithmetic number, because the mean of its divisors is an integer number (18239208).

Almost surely, 2^72727091 is an apocalyptic number.

72727091 is a deficient number, since it is larger than the sum of its proper divisors (229741).

72727091 is a wasteful number, since it uses less digits than its factorization.

72727091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229740.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 72727091 is about 8528.0179995120. The cubic root of 72727091 is about 417.4124568143.

The spelling of 72727091 in words is "seventy-two million, seven hundred twenty-seven thousand, ninety-one".