71488273 has 2 divisors, whose sum is σ = 71488274. Its totient is φ = 71488272.

The previous prime is 71488259. The next prime is 71488289. The reversal of 71488273 is 37288417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63552784 + 7935489 = 7972^2 + 2817^2 .

It is an emirp because it is prime and its reverse (37288417) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71488273 is a prime.

It is a super-2 number, since 2×71488273² = 10221146353045058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71488073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35744136 + 35744137.

It is an arithmetic number, because the mean of its divisors is an integer number (35744137).

Almost surely, 2^71488273 is an apocalyptic number.

It is an amenable number.

71488273 is a deficient number, since it is larger than the sum of its proper divisors (1).

71488273 is an equidigital number, since it uses as much as digits as its factorization.

71488273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 40.

The square root of 71488273 is about 8455.0738021616. The cubic root of 71488273 is about 415.0288323704.

The spelling of 71488273 in words is "seventy-one million, four hundred eighty-eight thousand, two hundred seventy-three".