71397308 has 6 divisors (see below), whose sum is σ = 124945296. Its totient is φ = 35698652.

The previous prime is 71397301. The next prime is 71397311. The reversal of 71397308 is 80379317.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71397301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8924660 + ... + 8924667.

It is an arithmetic number, because the mean of its divisors is an integer number (20824216).

Almost surely, 2^71397308 is an apocalyptic number.

It is an amenable number.

71397308 is a deficient number, since it is larger than the sum of its proper divisors (53547988).

71397308 is a wasteful number, since it uses less digits than its factorization.

71397308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17849331 (or 17849329 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 71397308 is about 8449.6927754801. The cubic root of 71397308 is about 414.8527236633.

Subtracting 71397308 from its reverse (80379317), we obtain a square (8982009 = 2997²).

The spelling of 71397308 in words is "seventy-one million, three hundred ninety-seven thousand, three hundred eight".