72139743 has 12 divisors (see below), whose sum is σ = 112217560. Its totient is φ = 44393616.

The previous prime is 72139723. The next prime is 72139747. The reversal of 72139743 is 34793127.

It is not a de Polignac number, because 72139743 - 2¹⁰ = 72138719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72139698 and 72139707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72139747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308173 + ... + 308406.

Almost surely, 2^72139743 is an apocalyptic number.

72139743 is a deficient number, since it is larger than the sum of its proper divisors (40077817).

72139743 is a wasteful number, since it uses less digits than its factorization.

72139743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616598 (or 616595 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 72139743 is about 8493.5118178525. The cubic root of 72139743 is about 416.2857361846.

The spelling of 72139743 in words is "seventy-two million, one hundred thirty-nine thousand, seven hundred forty-three".