71939449 has 8 divisors (see below), whose sum is σ = 72569952. Its totient is φ = 71312160.

The previous prime is 71939443. The next prime is 71939471. The reversal of 71939449 is 94493917.

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 71939449 - 2¹³ = 71931257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71939399 and 71939408.

It is not an unprimeable number, because it can be changed into a prime (71939443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65394 + ... + 66484.

It is an arithmetic number, because the mean of its divisors is an integer number (9071244).

Almost surely, 2^71939449 is an apocalyptic number.

It is an amenable number.

71939449 is a deficient number, since it is larger than the sum of its proper divisors (630503).

71939449 is a wasteful number, since it uses less digits than its factorization.

71939449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607.

The product of its digits is 244944, while the sum is 46.

The square root of 71939449 is about 8481.7126218707. The cubic root of 71939449 is about 415.9001104624.

The spelling of 71939449 in words is "seventy-one million, nine hundred thirty-nine thousand, four hundred forty-nine".