72147443 has 2 divisors, whose sum is σ = 72147444. Its totient is φ = 72147442.

The previous prime is 72147419. The next prime is 72147457. The reversal of 72147443 is 34474127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72147443 - 2⁶ = 72147379 is a prime.

It is a super-3 number, since 3×72147443³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (72147403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36073721 + 36073722.

It is an arithmetic number, because the mean of its divisors is an integer number (36073722).

Almost surely, 2^72147443 is an apocalyptic number.

72147443 is a deficient number, since it is larger than the sum of its proper divisors (1).

72147443 is an equidigital number, since it uses as much as digits as its factorization.

72147443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 32.

The square root of 72147443 is about 8493.9650929351. The cubic root of 72147443 is about 416.3005467269.

The spelling of 72147443 in words is "seventy-two million, one hundred forty-seven thousand, four hundred forty-three".