71316913 has 4 divisors (see below), whose sum is σ = 71795700. Its totient is φ = 70838128.

The previous prime is 71316911. The next prime is 71316941. The reversal of 71316913 is 31961317.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44515584 + 26801329 = 6672^2 + 5177^2 .

It is a cyclic number.

It is not a de Polignac number, because 71316913 - 2¹ = 71316911 is a prime.

It is a super-2 number, since 2×71316913² = 10172204159699138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71316911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239170 + ... + 239467.

It is an arithmetic number, because the mean of its divisors is an integer number (17948925).

Almost surely, 2^71316913 is an apocalyptic number.

It is an amenable number.

71316913 is a deficient number, since it is larger than the sum of its proper divisors (478787).

71316913 is a wasteful number, since it uses less digits than its factorization.

71316913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478786.

The product of its digits is 3402, while the sum is 31.

The square root of 71316913 is about 8444.9341619695. The cubic root of 71316913 is about 414.6969539670.

The spelling of 71316913 in words is "seventy-one million, three hundred sixteen thousand, nine hundred thirteen".