7439457881 has 2 divisors, whose sum is σ = 7439457882. Its totient is φ = 7439457880.

The previous prime is 7439457869. The next prime is 7439457911. The reversal of 7439457881 is 1887549347.

7439457881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3805779481 + 3633678400 = 61691^2 + 60280^2 .

It is an emirp because it is prime and its reverse (1887549347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7439457881 - 2¹⁸ = 7439195737 is a prime.

It is a super-2 number, since 2×7439457881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7439457481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3719728940 + 3719728941.

It is an arithmetic number, because the mean of its divisors is an integer number (3719728941).

Almost surely, 2^7439457881 is an apocalyptic number.

It is an amenable number.

7439457881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7439457881 is an equidigital number, since it uses as much as digits as its factorization.

7439457881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 56.

The square root of 7439457881 is about 86252.2920333135. The cubic root of 7439457881 is about 1952.1525982032.

The spelling of 7439457881 in words is "seven billion, four hundred thirty-nine million, four hundred fifty-seven thousand, eight hundred eighty-one".