3644424389 has 2 divisors, whose sum is σ = 3644424390. Its totient is φ = 3644424388.

The previous prime is 3644424337. The next prime is 3644424431. The reversal of 3644424389 is 9834244463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3001396225 + 643028164 = 54785^2 + 25358^2 .

It is an emirp because it is prime and its reverse (9834244463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3644424389 - 2¹² = 3644420293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3644424989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822212194 + 1822212195.

It is an arithmetic number, because the mean of its divisors is an integer number (1822212195).

Almost surely, 2^3644424389 is an apocalyptic number.

It is an amenable number.

3644424389 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644424389 is an equidigital number, since it uses as much as digits as its factorization.

3644424389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 47.

The square root of 3644424389 is about 60369.0681475207. The cubic root of 3644424389 is about 1538.8973369653.

The spelling of 3644424389 in words is "three billion, six hundred forty-four million, four hundred twenty-four thousand, three hundred eighty-nine".