72511743 has 4 divisors (see below), whose sum is σ = 96682328. Its totient is φ = 48341160.

The previous prime is 72511729. The next prime is 72511763. The reversal of 72511743 is 34711527.

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

It is not a de Polignac number, because 72511743 - 2⁴ = 72511727 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 72511743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72511723) 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, 12085288 + ... + 12085293.

It is an arithmetic number, because the mean of its divisors is an integer number (24170582).

Almost surely, 2^72511743 is an apocalyptic number.

72511743 is a deficient number, since it is larger than the sum of its proper divisors (24170585).

72511743 is a wasteful number, since it uses less digits than its factorization.

72511743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24170584.

The product of its digits is 5880, while the sum is 30.

The square root of 72511743 is about 8515.3827277463. The cubic root of 72511743 is about 417.0000575079. Note that the first 4 decimals are identical.

Subtracting from 72511743 its sum of digits (30), we obtain a cube (72511713 = 417³).

The spelling of 72511743 in words is "seventy-two million, five hundred eleven thousand, seven hundred forty-three".