71440617 has 4 divisors (see below), whose sum is σ = 95254160. Its totient is φ = 47627076.

The previous prime is 71440609. The next prime is 71440619. The reversal of 71440617 is 71604417.

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.

It is not a de Polignac number, because 71440617 - 2³ = 71440609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71440619) 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, 11906767 + ... + 11906772.

It is an arithmetic number, because the mean of its divisors is an integer number (23813540).

Almost surely, 2^71440617 is an apocalyptic number.

It is an amenable number.

71440617 is a deficient number, since it is larger than the sum of its proper divisors (23813543).

71440617 is a wasteful number, since it uses less digits than its factorization.

71440617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23813542.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 71440617 is about 8452.2551428598. The cubic root of 71440617 is about 414.9365887533.

The spelling of 71440617 in words is "seventy-one million, four hundred forty thousand, six hundred seventeen".