71711397 has 6 divisors (see below), whose sum is σ = 103583142. Its totient is φ = 47807592.

The previous prime is 71711383. The next prime is 71711399. The reversal of 71711397 is 79311717.

It can be written as a sum of positive squares in only one way, i.e., 70459236 + 1252161 = 8394^2 + 1119^2 .

It is not a de Polignac number, because 71711397 - 2²⁴ = 54934181 is a prime.

It is a super-3 number, since 3×71711397³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71711399) 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, 3983958 + ... + 3983975.

It is an arithmetic number, because the mean of its divisors is an integer number (17263857).

Almost surely, 2^71711397 is an apocalyptic number.

It is an amenable number.

71711397 is a deficient number, since it is larger than the sum of its proper divisors (31871745).

71711397 is a wasteful number, since it uses less digits than its factorization.

71711397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7967939 (or 7967936 counting only the distinct ones).

The product of its digits is 9261, while the sum is 36.

The square root of 71711397 is about 8468.2582034324. The cubic root of 71711397 is about 415.4601698668.

The spelling of 71711397 in words is "seventy-one million, seven hundred eleven thousand, three hundred ninety-seven".