64423441 has 4 divisors (see below), whose sum is σ = 64596532. Its totient is φ = 64250352.

The previous prime is 64423439. The next prime is 64423453. The reversal of 64423441 is 14432446.

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 32444416 + 31979025 = 5696^2 + 5655^2 .

It is a cyclic number.

It is not a de Polignac number, because 64423441 - 2¹ = 64423439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64423241) 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, 85986 + ... + 86731.

It is an arithmetic number, because the mean of its divisors is an integer number (16149133).

Almost surely, 2^64423441 is an apocalyptic number.

It is an amenable number.

64423441 is a deficient number, since it is larger than the sum of its proper divisors (173091).

64423441 is a wasteful number, since it uses less digits than its factorization.

64423441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173090.

The product of its digits is 9216, while the sum is 28.

The square root of 64423441 is about 8026.4214317465. The cubic root of 64423441 is about 400.8802303156.

Adding to 64423441 its reverse (14432446), we get a palindrome (78855887).

The spelling of 64423441 in words is "sixty-four million, four hundred twenty-three thousand, four hundred forty-one".