72844751 has 4 divisors (see below), whose sum is σ = 83251152. Its totient is φ = 62438352.

The previous prime is 72844721. The next prime is 72844753. The reversal of 72844751 is 15744827.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72844751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72844753) 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, 5203190 + ... + 5203203.

It is an arithmetic number, because the mean of its divisors is an integer number (20812788).

Almost surely, 2^72844751 is an apocalyptic number.

72844751 is a deficient number, since it is larger than the sum of its proper divisors (10406401).

72844751 is a wasteful number, since it uses less digits than its factorization.

72844751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10406400.

The product of its digits is 62720, while the sum is 38.

The square root of 72844751 is about 8534.9136492410. The cubic root of 72844751 is about 417.6374361969.

The spelling of 72844751 in words is "seventy-two million, eight hundred forty-four thousand, seven hundred fifty-one".