64942223 has 4 divisors (see below), whose sum is σ = 67181640. Its totient is φ = 62702808.

The previous prime is 64942211. The next prime is 64942279. The reversal of 64942223 is 32224946.

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

It is a cyclic number.

It is not a de Polignac number, because 64942223 - 2¹⁰ = 64941199 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 64942223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64942723) 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 3 ways as a sum of consecutive naturals, for example, 1119665 + ... + 1119722.

It is an arithmetic number, because the mean of its divisors is an integer number (16795410).

Almost surely, 2^64942223 is an apocalyptic number.

64942223 is a deficient number, since it is larger than the sum of its proper divisors (2239417).

64942223 is a wasteful number, since it uses less digits than its factorization.

64942223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239416.

The product of its digits is 20736, while the sum is 32.

The square root of 64942223 is about 8058.6737742634. The cubic root of 64942223 is about 401.9534095325.

The spelling of 64942223 in words is "sixty-four million, nine hundred forty-two thousand, two hundred twenty-three".