64449693 has 24 divisors (see below), whose sum is σ = 116066496. Its totient is φ = 33480000.

The previous prime is 64449683. The next prime is 64449719. The reversal of 64449693 is 39694446.

It is a happy number.

It is not a de Polignac number, because 64449693 - 2¹³ = 64441501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64449673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45808 + ... + 47193.

It is an arithmetic number, because the mean of its divisors is an integer number (4836104).

Almost surely, 2^64449693 is an apocalyptic number.

64449693 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

64449693 is a deficient number, since it is larger than the sum of its proper divisors (51616803).

64449693 is a wasteful number, since it uses less digits than its factorization.

64449693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93025 (or 93022 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 64449693 is about 8028.0566141502. The cubic root of 64449693 is about 400.9346746737.

The spelling of 64449693 in words is "sixty-four million, four hundred forty-nine thousand, six hundred ninety-three".