64923445 has 4 divisors (see below), whose sum is σ = 77908140. Its totient is φ = 51938752.

The previous prime is 64923371. The next prime is 64923449. The reversal of 64923445 is 54432946.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8988004 + 55935441 = 2998^2 + 7479^2 .

It is a cyclic number.

It is not a de Polignac number, because 64923445 - 2⁷ = 64923317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64923449) 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, 6492340 + ... + 6492349.

It is an arithmetic number, because the mean of its divisors is an integer number (19477035).

Almost surely, 2^64923445 is an apocalyptic number.

It is an amenable number.

64923445 is a deficient number, since it is larger than the sum of its proper divisors (12984695).

64923445 is a wasteful number, since it uses less digits than its factorization.

64923445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12984694.

The product of its digits is 103680, while the sum is 37.

The square root of 64923445 is about 8057.5086099861. The cubic root of 64923445 is about 401.9146642787.

The spelling of 64923445 in words is "sixty-four million, nine hundred twenty-three thousand, four hundred forty-five".