64873449 has 6 divisors (see below), whose sum is σ = 93706106. Its totient is φ = 43248960.

The previous prime is 64873441. The next prime is 64873451. The reversal of 64873449 is 94437846.

It can be written as a sum of positive squares in only one way, i.e., 59397849 + 5475600 = 7707^2 + 2340^2 .

It is not a de Polignac number, because 64873449 - 2³ = 64873441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64873441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3604072 + ... + 3604089.

Almost surely, 2^64873449 is an apocalyptic number.

It is an amenable number.

64873449 is a deficient number, since it is larger than the sum of its proper divisors (28832657).

64873449 is a wasteful number, since it uses less digits than its factorization.

64873449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7208167 (or 7208164 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 64873449 is about 8054.4055646584. The cubic root of 64873449 is about 401.8114694787.

The spelling of 64873449 in words is "sixty-four million, eight hundred seventy-three thousand, four hundred forty-nine".