71272393 has 2 divisors, whose sum is σ = 71272394. Its totient is φ = 71272392.

The previous prime is 71272387. The next prime is 71272403. The reversal of 71272393 is 39327217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71014329 + 258064 = 8427^2 + 508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71272393 is a prime.

It is not a weakly prime, because it can be changed into another prime (71272793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35636196 + 35636197.

It is an arithmetic number, because the mean of its divisors is an integer number (35636197).

Almost surely, 2^71272393 is an apocalyptic number.

It is an amenable number.

71272393 is a deficient number, since it is larger than the sum of its proper divisors (1).

71272393 is an equidigital number, since it uses as much as digits as its factorization.

71272393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 34.

The square root of 71272393 is about 8442.2978507039. The cubic root of 71272393 is about 414.6106436717.

The spelling of 71272393 in words is "seventy-one million, two hundred seventy-two thousand, three hundred ninety-three".