72726783 has 8 divisors (see below), whose sum is σ = 97014528. Its totient is φ = 48461784.

The previous prime is 72726781. The next prime is 72726821. The reversal of 72726783 is 38762727.

It is a Cunningham number, because it is equal to 8528²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72726783 - 2¹ = 72726781 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72726781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4266 + ... + 12792.

It is an arithmetic number, because the mean of its divisors is an integer number (12126816).

Almost surely, 2^72726783 is an apocalyptic number.

72726783 is a deficient number, since it is larger than the sum of its proper divisors (24287745).

72726783 is a wasteful number, since it uses less digits than its factorization.

72726783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11373.

The product of its digits is 197568, while the sum is 42.

The square root of 72726783 is about 8527.9999413696. Note that the first 4 decimals coincide. The cubic root of 72726783 is about 417.4118675647.

The spelling of 72726783 in words is "seventy-two million, seven hundred twenty-six thousand, seven hundred eighty-three".