7638473329 has 2 divisors, whose sum is σ = 7638473330. Its totient is φ = 7638473328.

The previous prime is 7638473281. The next prime is 7638473363. The reversal of 7638473329 is 9233748367.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5367760225 + 2270713104 = 73265^2 + 47652^2 .

It is a cyclic number.

It is not a de Polignac number, because 7638473329 - 2¹⁹ = 7637949041 is a prime.

It is not a weakly prime, because it can be changed into another prime (7638413329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3819236664 + 3819236665.

It is an arithmetic number, because the mean of its divisors is an integer number (3819236665).

Almost surely, 2^7638473329 is an apocalyptic number.

It is an amenable number.

7638473329 is a deficient number, since it is larger than the sum of its proper divisors (1).

7638473329 is an equidigital number, since it uses as much as digits as its factorization.

7638473329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 52.

The square root of 7638473329 is about 87398.3599903339. The cubic root of 7638473329 is about 1969.4072038609.

The spelling of 7638473329 in words is "seven billion, six hundred thirty-eight million, four hundred seventy-three thousand, three hundred twenty-nine".