7147442681 has 2 divisors, whose sum is σ = 7147442682. Its totient is φ = 7147442680.

The previous prime is 7147442669. The next prime is 7147442737. The reversal of 7147442681 is 1862447417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6846073081 + 301369600 = 82741^2 + 17360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7147442681 is a prime.

It is a super-2 number, since 2×7147442681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7147442611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3573721340 + 3573721341.

It is an arithmetic number, because the mean of its divisors is an integer number (3573721341).

Almost surely, 2^7147442681 is an apocalyptic number.

It is an amenable number.

7147442681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7147442681 is an equidigital number, since it uses as much as digits as its factorization.

7147442681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 44.

The square root of 7147442681 is about 84542.5495298078. The cubic root of 7147442681 is about 1926.2688149174.

The spelling of 7147442681 in words is "seven billion, one hundred forty-seven million, four hundred forty-two thousand, six hundred eighty-one".