71395273 has 2 divisors, whose sum is σ = 71395274. Its totient is φ = 71395272.

The previous prime is 71395169. The next prime is 71395297. The reversal of 71395273 is 37259317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71368704 + 26569 = 8448^2 + 163^2 .

It is an emirp because it is prime and its reverse (37259317) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71395273 is a prime.

It is not a weakly prime, because it can be changed into another prime (71395873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35697636 + 35697637.

It is an arithmetic number, because the mean of its divisors is an integer number (35697637).

Almost surely, 2^71395273 is an apocalyptic number.

It is an amenable number.

71395273 is a deficient number, since it is larger than the sum of its proper divisors (1).

71395273 is an equidigital number, since it uses as much as digits as its factorization.

71395273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39690, while the sum is 37.

The square root of 71395273 is about 8449.5723560426. The cubic root of 71395273 is about 414.8487821827.

It can be divided in two parts, 713952 and 73, that added together give a square (714025 = 845²).

The spelling of 71395273 in words is "seventy-one million, three hundred ninety-five thousand, two hundred seventy-three".