7638888973 has 2 divisors, whose sum is σ = 7638888974. Its totient is φ = 7638888972.

The previous prime is 7638888947. The next prime is 7638888977. The reversal of 7638888973 is 3798888367.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6532195684 + 1106693289 = 80822^2 + 33267^2 .

It is a cyclic number.

It is not a de Polignac number, because 7638888973 - 2⁵ = 7638888941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7638888899 and 7638888908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7638888977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3819444486 + 3819444487.

It is an arithmetic number, because the mean of its divisors is an integer number (3819444487).

Almost surely, 2^7638888973 is an apocalyptic number.

It is an amenable number.

7638888973 is a deficient number, since it is larger than the sum of its proper divisors (1).

7638888973 is an equidigital number, since it uses as much as digits as its factorization.

7638888973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97542144, while the sum is 67.

The square root of 7638888973 is about 87400.7378286934. The cubic root of 7638888973 is about 1969.4429246743.

The spelling of 7638888973 in words is "seven billion, six hundred thirty-eight million, eight hundred eighty-eight thousand, nine hundred seventy-three".