64222973 has 4 divisors (see below), whose sum is σ = 64240380. Its totient is φ = 64205568.

The previous prime is 64222967. The next prime is 64222981. The reversal of 64222973 is 37922246.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37922246 = 2 ⋅18961123.

It can be written as a sum of positive squares in 2 ways, for example, as 813604 + 63409369 = 902^2 + 7963^2 .

It is a cyclic number.

It is not a de Polignac number, because 64222973 - 2¹⁴ = 64206589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64222903) 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, 740 + ... + 11357.

It is an arithmetic number, because the mean of its divisors is an integer number (16060095).

Almost surely, 2^64222973 is an apocalyptic number.

It is an amenable number.

64222973 is a deficient number, since it is larger than the sum of its proper divisors (17407).

64222973 is a wasteful number, since it uses less digits than its factorization.

64222973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17406.

The product of its digits is 36288, while the sum is 35.

The square root of 64222973 is about 8013.9236956687. The cubic root of 64222973 is about 400.4639886615.

The spelling of 64222973 in words is "sixty-four million, two hundred twenty-two thousand, nine hundred seventy-three".