71640473 has 8 divisors (see below), whose sum is σ = 75951360. Its totient is φ = 67454640.

The previous prime is 71640467. The next prime is 71640493. The reversal of 71640473 is 37404617.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71640473 - 2²⁶ = 4531609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71640433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30083 + ... + 32376.

It is an arithmetic number, because the mean of its divisors is an integer number (9493920).

Almost surely, 2^71640473 is an apocalyptic number.

It is an amenable number.

71640473 is a deficient number, since it is larger than the sum of its proper divisors (4310887).

71640473 is a wasteful number, since it uses less digits than its factorization.

71640473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62527.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 71640473 is about 8464.0695294876. The cubic root of 71640473 is about 415.3231585602.

The spelling of 71640473 in words is "seventy-one million, six hundred forty thousand, four hundred seventy-three".