72726071 has 4 divisors (see below), whose sum is σ = 79337544. Its totient is φ = 66114600.

The previous prime is 72726013. The next prime is 72726103. The reversal of 72726071 is 17062727.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17062727 = 11 ⋅1551157.

It is a cyclic number.

It is not a de Polignac number, because 72726071 - 2⁶ = 72726007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72726371) 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, 3305720 + ... + 3305741.

It is an arithmetic number, because the mean of its divisors is an integer number (19834386).

Almost surely, 2^72726071 is an apocalyptic number.

72726071 is a deficient number, since it is larger than the sum of its proper divisors (6611473).

72726071 is a wasteful number, since it uses less digits than its factorization.

72726071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6611472.

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 72726071 is about 8527.9581964266. The cubic root of 72726071 is about 417.4105053970.

Adding to 72726071 its reverse (17062727), we get a palindrome (89788798).

The spelling of 72726071 in words is "seventy-two million, seven hundred twenty-six thousand, seventy-one".