64440427 has 2 divisors, whose sum is σ = 64440428. Its totient is φ = 64440426.

The previous prime is 64440403. The next prime is 64440451. The reversal of 64440427 is 72404446.

It is a balanced prime because it is at equal distance from previous prime (64440403) and next prime (64440451).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64440427 is a prime.

It is not a weakly prime, because it can be changed into another prime (64440487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32220213 + 32220214.

It is an arithmetic number, because the mean of its divisors is an integer number (32220214).

Almost surely, 2^64440427 is an apocalyptic number.

64440427 is a deficient number, since it is larger than the sum of its proper divisors (1).

64440427 is an equidigital number, since it uses as much as digits as its factorization.

64440427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 31.

The square root of 64440427 is about 8027.4794923438. The cubic root of 64440427 is about 400.9154594865.

The spelling of 64440427 in words is "sixty-four million, four hundred forty thousand, four hundred twenty-seven".