71354643 has 4 divisors (see below), whose sum is σ = 95139528. Its totient is φ = 47569760.

The previous prime is 71354639. The next prime is 71354683. The reversal of 71354643 is 34645317.

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 71354643 - 2² = 71354639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71354603) 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, 11892438 + ... + 11892443.

It is an arithmetic number, because the mean of its divisors is an integer number (23784882).

Almost surely, 2^71354643 is an apocalyptic number.

71354643 is a deficient number, since it is larger than the sum of its proper divisors (23784885).

71354643 is a wasteful number, since it uses less digits than its factorization.

71354643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23784884.

The product of its digits is 30240, while the sum is 33.

The square root of 71354643 is about 8447.1677501989. The cubic root of 71354643 is about 414.7700724694.

The spelling of 71354643 in words is "seventy-one million, three hundred fifty-four thousand, six hundred forty-three".