71299273 has 2 divisors, whose sum is σ = 71299274. Its totient is φ = 71299272.

The previous prime is 71299247. The next prime is 71299279. The reversal of 71299273 is 37299217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55830784 + 15468489 = 7472^2 + 3933^2 .

It is a cyclic number.

It is not a de Polignac number, because 71299273 - 2⁹ = 71298761 is a prime.

It is not a weakly prime, because it can be changed into another prime (71299279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35649636 + 35649637.

It is an arithmetic number, because the mean of its divisors is an integer number (35649637).

Almost surely, 2^71299273 is an apocalyptic number.

It is an amenable number.

71299273 is a deficient number, since it is larger than the sum of its proper divisors (1).

71299273 is an equidigital number, since it uses as much as digits as its factorization.

71299273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 71299273 is about 8443.8896842628. The cubic root of 71299273 is about 414.6627598459.

The spelling of 71299273 in words is "seventy-one million, two hundred ninety-nine thousand, two hundred seventy-three".