71071313 has 4 divisors (see below), whose sum is σ = 73363968. Its totient is φ = 68778660.

The previous prime is 71071309. The next prime is 71071331. The reversal of 71071313 is 31317017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31317017 = 1319 ⋅23743.

It is a cyclic number.

It is not a de Polignac number, because 71071313 - 2² = 71071309 is a prime.

It is a super-2 number, since 2×71071313² = 10102263063087938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71071333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1146281 + ... + 1146342.

It is an arithmetic number, because the mean of its divisors is an integer number (18340992).

Almost surely, 2^71071313 is an apocalyptic number.

It is an amenable number.

71071313 is a deficient number, since it is larger than the sum of its proper divisors (2292655).

71071313 is a wasteful number, since it uses less digits than its factorization.

71071313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292654.

The product of its (nonzero) digits is 441, while the sum is 23.

The square root of 71071313 is about 8430.3803591534. The cubic root of 71071313 is about 414.2203642972.

The spelling of 71071313 in words is "seventy-one million, seventy-one thousand, three hundred thirteen".