7387656889 has 2 divisors, whose sum is σ = 7387656890. Its totient is φ = 7387656888.

The previous prime is 7387656863. The next prime is 7387656907. The reversal of 7387656889 is 9886567837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5368053289 + 2019603600 = 73267^2 + 44940^2 .

It is an emirp because it is prime and its reverse (9886567837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7387656889 - 2⁹ = 7387656377 is a prime.

It is not a weakly prime, because it can be changed into another prime (7387656389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3693828444 + 3693828445.

It is an arithmetic number, because the mean of its divisors is an integer number (3693828445).

Almost surely, 2^7387656889 is an apocalyptic number.

It is an amenable number.

7387656889 is a deficient number, since it is larger than the sum of its proper divisors (1).

7387656889 is an equidigital number, since it uses as much as digits as its factorization.

7387656889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121927680, while the sum is 67.

The square root of 7387656889 is about 85951.4798534615. The cubic root of 7387656889 is about 1947.6110907158.

The spelling of 7387656889 in words is "seven billion, three hundred eighty-seven million, six hundred fifty-six thousand, eight hundred eighty-nine".