71704289 has 4 divisors (see below), whose sum is σ = 72133824. Its totient is φ = 71274756.

The previous prime is 71704279. The next prime is 71704301. The reversal of 71704289 is 98240717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98240717 = 8081 ⋅12157.

It is a cyclic number.

It is not a de Polignac number, because 71704289 - 2⁴ = 71704273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71704279) 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, 214517 + ... + 214850.

It is an arithmetic number, because the mean of its divisors is an integer number (18033456).

Almost surely, 2^71704289 is an apocalyptic number.

It is an amenable number.

71704289 is a deficient number, since it is larger than the sum of its proper divisors (429535).

71704289 is a wasteful number, since it uses less digits than its factorization.

71704289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429534.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 71704289 is about 8467.8385081436. The cubic root of 71704289 is about 415.4464426743.

The spelling of 71704289 in words is "seventy-one million, seven hundred four thousand, two hundred eighty-nine".