71730297 has 6 divisors (see below), whose sum is σ = 103610442. Its totient is φ = 47820192.

The previous prime is 71730287. The next prime is 71730299. The reversal of 71730297 is 79203717.

It can be written as a sum of positive squares in only one way, i.e., 67420521 + 4309776 = 8211^2 + 2076^2 .

It is not a de Polignac number, because 71730297 - 2⁶ = 71730233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71730299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3985008 + ... + 3985025.

It is an arithmetic number, because the mean of its divisors is an integer number (17268407).

Almost surely, 2^71730297 is an apocalyptic number.

It is an amenable number.

71730297 is a deficient number, since it is larger than the sum of its proper divisors (31880145).

71730297 is a wasteful number, since it uses less digits than its factorization.

71730297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970039 (or 7970036 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 71730297 is about 8469.3740618773. The cubic root of 71730297 is about 415.4966657276.

It can be divided in two parts, 71730 and 297, that added together give a palindrome (72027).

The spelling of 71730297 in words is "seventy-one million, seven hundred thirty thousand, two hundred ninety-seven".