64449283 has 4 divisors (see below), whose sum is σ = 64470960. Its totient is φ = 64427608.

The previous prime is 64449271. The next prime is 64449293. The reversal of 64449283 is 38294446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64449283 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64449233) 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, 5503 + ... + 12616.

It is an arithmetic number, because the mean of its divisors is an integer number (16117740).

Almost surely, 2^64449283 is an apocalyptic number.

64449283 is a deficient number, since it is larger than the sum of its proper divisors (21677).

64449283 is a wasteful number, since it uses less digits than its factorization.

64449283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21676.

The product of its digits is 165888, while the sum is 40.

The square root of 64449283 is about 8028.0310786643. The cubic root of 64449283 is about 400.9338244831.

The spelling of 64449283 in words is "sixty-four million, four hundred forty-nine thousand, two hundred eighty-three".