72712726 has 4 divisors (see below), whose sum is σ = 109069092. Its totient is φ = 36356362.

The previous prime is 72712709. The next prime is 72712741. The reversal of 72712726 is 62721727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62721727 = 4943 ⋅12689.

It is a junction number, because it is equal to n+sod(n) for n = 72712691 and 72712700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18178180 + ... + 18178183.

It is an arithmetic number, because the mean of its divisors is an integer number (27267273).

Almost surely, 2^72712726 is an apocalyptic number.

72712726 is a deficient number, since it is larger than the sum of its proper divisors (36356366).

72712726 is a wasteful number, since it uses less digits than its factorization.

72712726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36356365.

The product of its digits is 16464, while the sum is 34.

The square root of 72712726 is about 8527.1757340869. The cubic root of 72712726 is about 417.3849726737.

Subtracting from 72712726 its reverse (62721727), we obtain a palindrome (9990999).

The spelling of 72712726 in words is "seventy-two million, seven hundred twelve thousand, seven hundred twenty-six".