7439457889 has 4 divisors (see below), whose sum is σ = 7439694340. Its totient is φ = 7439221440.

The previous prime is 7439457881. The next prime is 7439457911. The reversal of 7439457889 is 9887549347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9887549347 = 13 ⋅760580719.

It can be written as a sum of positive squares in 2 ways, for example, as 2046024289 + 5393433600 = 45233^2 + 73440^2 .

It is a cyclic number.

It is not a de Polignac number, because 7439457889 - 2³ = 7439457881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7439457889.

It is not an unprimeable number, because it can be changed into a prime (7439457881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62172 + ... + 136909.

It is an arithmetic number, because the mean of its divisors is an integer number (1859923585).

Almost surely, 2^7439457889 is an apocalyptic number.

It is an amenable number.

7439457889 is a deficient number, since it is larger than the sum of its proper divisors (236451).

7439457889 is a wasteful number, since it uses less digits than its factorization.

7439457889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236450.

The product of its digits is 60963840, while the sum is 64.

The square root of 7439457889 is about 86252.2920796891. The cubic root of 7439457889 is about 1952.1525989030.

The spelling of 7439457889 in words is "seven billion, four hundred thirty-nine million, four hundred fifty-seven thousand, eight hundred eighty-nine".