72097711 has 4 divisors (see below), whose sum is σ = 82397392. Its totient is φ = 61798032.

The previous prime is 72097703. The next prime is 72097717. The reversal of 72097711 is 11779027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72097711 - 2³ = 72097703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72097717) 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, 5149830 + ... + 5149843.

It is an arithmetic number, because the mean of its divisors is an integer number (20599348).

Almost surely, 2^72097711 is an apocalyptic number.

72097711 is a deficient number, since it is larger than the sum of its proper divisors (10299681).

72097711 is a wasteful number, since it uses less digits than its factorization.

72097711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10299680.

The product of its (nonzero) digits is 6174, while the sum is 34.

The square root of 72097711 is about 8491.0370980228. The cubic root of 72097711 is about 416.2048712749.

The spelling of 72097711 in words is "seventy-two million, ninety-seven thousand, seven hundred eleven".