72737347 has 4 divisors (see below), whose sum is σ = 72754416. Its totient is φ = 72720280.

The previous prime is 72737323. The next prime is 72737363. The reversal of 72737347 is 74373727.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74373727 = 83 ⋅896069.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72737347 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72737317) 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, 3813 + ... + 12649.

It is an arithmetic number, because the mean of its divisors is an integer number (18188604).

Almost surely, 2^72737347 is an apocalyptic number.

72737347 is a deficient number, since it is larger than the sum of its proper divisors (17069).

72737347 is an equidigital number, since it uses as much as digits as its factorization.

72737347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17068.

The product of its digits is 172872, while the sum is 40.

The square root of 72737347 is about 8528.6192903658. The cubic root of 72737347 is about 417.4320771093.

The spelling of 72737347 in words is "seventy-two million, seven hundred thirty-seven thousand, three hundred forty-seven".