71617071 has 4 divisors (see below), whose sum is σ = 95489432. Its totient is φ = 47744712.

The previous prime is 71617057. The next prime is 71617087. The reversal of 71617071 is 17071617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17071617 = 3 ⋅5690539.

It is not a de Polignac number, because 71617071 - 2¹⁴ = 71600687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71617001) 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, 11936176 + ... + 11936181.

It is an arithmetic number, because the mean of its divisors is an integer number (23872358).

Almost surely, 2^71617071 is an apocalyptic number.

71617071 is a deficient number, since it is larger than the sum of its proper divisors (23872361).

71617071 is a wasteful number, since it uses less digits than its factorization.

71617071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23872360.

The product of its (nonzero) digits is 2058, while the sum is 30.

The square root of 71617071 is about 8462.6869846403. The cubic root of 71617071 is about 415.2779306294.

Adding to 71617071 its reverse (17071617), we get a palindrome (88688688).

The spelling of 71617071 in words is "seventy-one million, six hundred seventeen thousand, seventy-one".