64849423 has 4 divisors (see below), whose sum is σ = 67085640. Its totient is φ = 62613208.

The previous prime is 64849417. The next prime is 64849429. The reversal of 64849423 is 32494846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32494846 = 2 ⋅16247423.

It is an interprime number because it is at equal distance from previous prime (64849417) and next prime (64849429).

It is a cyclic number.

It is not a de Polignac number, because 64849423 - 2²¹ = 62752271 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64849429) 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, 1118065 + ... + 1118122.

It is an arithmetic number, because the mean of its divisors is an integer number (16771410).

Almost surely, 2^64849423 is an apocalyptic number.

64849423 is a deficient number, since it is larger than the sum of its proper divisors (2236217).

64849423 is a wasteful number, since it uses less digits than its factorization.

64849423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236216.

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

The square root of 64849423 is about 8052.9139446538. The cubic root of 64849423 is about 401.7618594840.

The spelling of 64849423 in words is "sixty-four million, eight hundred forty-nine thousand, four hundred twenty-three".