72744727 has 4 divisors (see below), whose sum is σ = 79357896. Its totient is φ = 66131560.

The previous prime is 72744713. The next prime is 72744739.

It is a happy number.

72744727 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 72744727 - 2⁷ = 72744599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72744727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72744527) 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 3 ways as a sum of consecutive naturals, for example, 3306568 + ... + 3306589.

It is an arithmetic number, because the mean of its divisors is an integer number (19839474).

Almost surely, 2^72744727 is an apocalyptic number.

72744727 is a deficient number, since it is larger than the sum of its proper divisors (6613169).

72744727 is a wasteful number, since it uses less digits than its factorization.

72744727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6613168.

The product of its digits is 153664, while the sum is 40.

The square root of 72744727 is about 8529.0519402803. The cubic root of 72744727 is about 417.4461943162.

It can be divided in two parts, 727 and 44727, that added together give a palindrome (45454).

The spelling of 72744727 in words is "seventy-two million, seven hundred forty-four thousand, seven hundred twenty-seven".