7944452389 has 2 divisors, whose sum is σ = 7944452390. Its totient is φ = 7944452388.

The previous prime is 7944452353. The next prime is 7944452419. The reversal of 7944452389 is 9832544497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4167735364 + 3776717025 = 64558^2 + 61455^2 .

It is a cyclic number.

It is not a de Polignac number, because 7944452389 - 2⁷ = 7944452261 is a prime.

It is a super-2 number, since 2×7944452389² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7944452339) 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 as a sum of consecutive naturals, namely, 3972226194 + 3972226195.

It is an arithmetic number, because the mean of its divisors is an integer number (3972226195).

Almost surely, 2^7944452389 is an apocalyptic number.

It is an amenable number.

7944452389 is a deficient number, since it is larger than the sum of its proper divisors (1).

7944452389 is an equidigital number, since it uses as much as digits as its factorization.

7944452389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 55.

The square root of 7944452389 is about 89131.6576138916. The cubic root of 7944452389 is about 1995.3602772262.

The spelling of 7944452389 in words is "seven billion, nine hundred forty-four million, four hundred fifty-two thousand, three hundred eighty-nine".