71290197 has 24 divisors (see below), whose sum is σ = 118946880. Its totient is φ = 40663680.

The previous prime is 71290189. The next prime is 71290213. The reversal of 71290197 is 79109217.

It is not a de Polignac number, because 71290197 - 2³ = 71290189 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71290127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19497 + ... + 22862.

It is an arithmetic number, because the mean of its divisors is an integer number (4956120).

Almost surely, 2^71290197 is an apocalyptic number.

It is an amenable number.

71290197 is a deficient number, since it is larger than the sum of its proper divisors (47656683).

71290197 is a wasteful number, since it uses less digits than its factorization.

71290197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42393 (or 42390 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 71290197 is about 8443.3522371153. The cubic root of 71290197 is about 414.6451643466.

It can be divided in two parts, 712 and 90197, that added together give a palindrome (90909).

The spelling of 71290197 in words is "seventy-one million, two hundred ninety thousand, one hundred ninety-seven".