71390671 has 8 divisors (see below), whose sum is σ = 77981904. Its totient is φ = 64816320.

The previous prime is 71390609. The next prime is 71390681. The reversal of 71390671 is 17609317.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71390671 - 2¹⁵ = 71357903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71390681) 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 7 ways as a sum of consecutive naturals, for example, 5641 + ... + 13213.

It is an arithmetic number, because the mean of its divisors is an integer number (9747738).

Almost surely, 2^71390671 is an apocalyptic number.

71390671 is a deficient number, since it is larger than the sum of its proper divisors (6591233).

71390671 is a wasteful number, since it uses less digits than its factorization.

71390671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8441.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 71390671 is about 8449.3000301800. The cubic root of 71390671 is about 414.8398685435.

Adding to 71390671 its reverse (17609317), we get a palindrome (88999988).

The spelling of 71390671 in words is "seventy-one million, three hundred ninety thousand, six hundred seventy-one".