71217423 has 12 divisors (see below), whose sum is σ = 103889448. Its totient is φ = 47007600.

The previous prime is 71217389. The next prime is 71217427. The reversal of 71217423 is 32471217.

It is a happy number.

It is not a de Polignac number, because 71217423 - 2⁹ = 71216911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71217427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38265 + ... + 40082.

It is an arithmetic number, because the mean of its divisors is an integer number (8657454).

Almost surely, 2^71217423 is an apocalyptic number.

71217423 is a deficient number, since it is larger than the sum of its proper divisors (32672025).

71217423 is a wasteful number, since it uses less digits than its factorization.

71217423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78454 (or 78451 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 71217423 is about 8439.0415925033. The cubic root of 71217423 is about 414.5040245074.

The spelling of 71217423 in words is "seventy-one million, two hundred seventeen thousand, four hundred twenty-three".