71449649 has 8 divisors (see below), whose sum is σ = 75168000. Its totient is φ = 67814992.

The previous prime is 71449639. The next prime is 71449663. The reversal of 71449649 is 94694417.

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

It is not a de Polignac number, because 71449649 - 2⁸ = 71449393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71449639) 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, 19169 + ... + 22590.

It is an arithmetic number, because the mean of its divisors is an integer number (9396000).

Almost surely, 2^71449649 is an apocalyptic number.

It is an amenable number.

71449649 is a deficient number, since it is larger than the sum of its proper divisors (3718351).

71449649 is a wasteful number, since it uses less digits than its factorization.

71449649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41847.

The product of its digits is 217728, while the sum is 44.

The square root of 71449649 is about 8452.7894212502. The cubic root of 71449649 is about 414.9540743682.

The spelling of 71449649 in words is "seventy-one million, four hundred forty-nine thousand, six hundred forty-nine".