71971396 has 18 divisors (see below), whose sum is σ = 146513598. Its totient is φ = 30844800.

The previous prime is 71971391. The next prime is 71971409. The reversal of 71971396 is 69317917.

It can be written as a sum of positive squares in only one way, i.e., 44408896 + 27562500 = 6664^2 + 5250^2 .

It is not an unprimeable number, because it can be changed into a prime (71971391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183405 + ... + 183796.

Almost surely, 2^71971396 is an apocalyptic number.

It is an amenable number.

71971396 is an abundant number, since it is smaller than the sum of its proper divisors (74542202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71971396 is a wasteful number, since it uses less digits than its factorization.

71971396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367219 (or 367210 counting only the distinct ones).

The product of its digits is 71442, while the sum is 43.

The square root of 71971396 is about 8483.5956999376. The cubic root of 71971396 is about 415.9616659080.

The spelling of 71971396 in words is "seventy-one million, nine hundred seventy-one thousand, three hundred ninety-six".