71423439 has 4 divisors (see below), whose sum is σ = 95231256. Its totient is φ = 47615624.

The previous prime is 71423423. The next prime is 71423461. The reversal of 71423439 is 93432417.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71423439 - 2⁴ = 71423423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71421439) 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, 11903904 + ... + 11903909.

It is an arithmetic number, because the mean of its divisors is an integer number (23807814).

Almost surely, 2^71423439 is an apocalyptic number.

71423439 is a deficient number, since it is larger than the sum of its proper divisors (23807817).

71423439 is a wasteful number, since it uses less digits than its factorization.

71423439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23807816.

The product of its digits is 18144, while the sum is 33.

The square root of 71423439 is about 8451.2389032615. The cubic root of 71423439 is about 414.9033287191.

The spelling of 71423439 in words is "seventy-one million, four hundred twenty-three thousand, four hundred thirty-nine".