7438609189 has 18 divisors (see below), whose sum is σ = 8262336390. Its totient is φ = 6691410000.

The previous prime is 7438609183. The next prime is 7438609223. The reversal of 7438609189 is 9819068347.

It can be written as a sum of positive squares in only one way, i.e., 6824412100 + 614197089 = 82610^2 + 24783^2 .

It is not a de Polignac number, because 7438609189 - 2²¹ = 7436512037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7438609183) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9904564 + ... + 9905314.

Almost surely, 2^7438609189 is an apocalyptic number.

It is an amenable number.

7438609189 is a deficient number, since it is larger than the sum of its proper divisors (823727201).

7438609189 is an equidigital number, since it uses as much as digits as its factorization.

7438609189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The square root of 7438609189 is about 86247.3720701101. The cubic root of 7438609189 is about 1952.0783616426.

The spelling of 7438609189 in words is "seven billion, four hundred thirty-eight million, six hundred nine thousand, one hundred eighty-nine".