64871449 has 4 divisors (see below), whose sum is σ = 65007360. Its totient is φ = 64735540.

The previous prime is 64871447. The next prime is 64871467. The reversal of 64871449 is 94417846.

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.

It is a cyclic number.

It is not a de Polignac number, because 64871449 - 2¹ = 64871447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64871447) 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, 67237 + ... + 68194.

It is an arithmetic number, because the mean of its divisors is an integer number (16251840).

Almost surely, 2^64871449 is an apocalyptic number.

It is an amenable number.

64871449 is a deficient number, since it is larger than the sum of its proper divisors (135911).

64871449 is a wasteful number, since it uses less digits than its factorization.

64871449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135910.

The product of its digits is 193536, while the sum is 43.

The square root of 64871449 is about 8054.2814080463. The cubic root of 64871449 is about 401.8073402538.

The spelling of 64871449 in words is "sixty-four million, eight hundred seventy-one thousand, four hundred forty-nine".