64449473 has 8 divisors (see below), whose sum is σ = 73365696. Its totient is φ = 56042800.

The previous prime is 64449467. The next prime is 64449479. The reversal of 64449473 is 37494446.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64449467) and next prime (64449479).

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

It is not a de Polignac number, because 64449473 - 2⁶ = 64449409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64449473.

It is not an unprimeable number, because it can be changed into a prime (64449479) 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, 127118 + ... + 127623.

It is an arithmetic number, because the mean of its divisors is an integer number (9170712).

Almost surely, 2^64449473 is an apocalyptic number.

It is an amenable number.

64449473 is a deficient number, since it is larger than the sum of its proper divisors (8916223).

64449473 is a wasteful number, since it uses less digits than its factorization.

64449473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254775.

The product of its digits is 290304, while the sum is 41.

The square root of 64449473 is about 8028.0429121922. The cubic root of 64449473 is about 400.9342184743.

The spelling of 64449473 in words is "sixty-four million, four hundred forty-nine thousand, four hundred seventy-three".