64424389 has 2 divisors, whose sum is σ = 64424390. Its totient is φ = 64424388.

The previous prime is 64424377. The next prime is 64424413. The reversal of 64424389 is 98342446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64272289 + 152100 = 8017^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 64424389 - 2¹³ = 64416197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64421389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32212194 + 32212195.

It is an arithmetic number, because the mean of its divisors is an integer number (32212195).

Almost surely, 2^64424389 is an apocalyptic number.

It is an amenable number.

64424389 is a deficient number, since it is larger than the sum of its proper divisors (1).

64424389 is an equidigital number, since it uses as much as digits as its factorization.

64424389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 40.

The square root of 64424389 is about 8026.4804864897. The cubic root of 64424389 is about 400.8821966423.

The spelling of 64424389 in words is "sixty-four million, four hundred twenty-four thousand, three hundred eighty-nine".