71632447 has 4 divisors (see below), whose sum is σ = 72701656. Its totient is φ = 70563240.

The previous prime is 71632433. The next prime is 71632487. The reversal of 71632447 is 74423617.

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 71632447 - 2¹⁹ = 71108159 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 (71632427) 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, 534504 + ... + 534637.

It is an arithmetic number, because the mean of its divisors is an integer number (18175414).

Almost surely, 2^71632447 is an apocalyptic number.

71632447 is a deficient number, since it is larger than the sum of its proper divisors (1069209).

71632447 is a wasteful number, since it uses less digits than its factorization.

71632447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069208.

The product of its digits is 28224, while the sum is 34.

The square root of 71632447 is about 8463.5953943936. The cubic root of 71632447 is about 415.3076482022.

The spelling of 71632447 in words is "seventy-one million, six hundred thirty-two thousand, four hundred forty-seven".