6629423789 has 2 divisors, whose sum is σ = 6629423790. Its totient is φ = 6629423788.

The previous prime is 6629423777. The next prime is 6629423833. The reversal of 6629423789 is 9873249266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6381613225 + 247810564 = 79885^2 + 15742^2 .

It is a cyclic number.

It is not a de Polignac number, because 6629423789 - 2³² = 2334456493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6629423719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3314711894 + 3314711895.

It is an arithmetic number, because the mean of its divisors is an integer number (3314711895).

Almost surely, 2^6629423789 is an apocalyptic number.

It is an amenable number.

6629423789 is a deficient number, since it is larger than the sum of its proper divisors (1).

6629423789 is an equidigital number, since it uses as much as digits as its factorization.

6629423789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 56.

The square root of 6629423789 is about 81421.2735653281. The cubic root of 6629423789 is about 1878.5608222262.

The spelling of 6629423789 in words is "six billion, six hundred twenty-nine million, four hundred twenty-three thousand, seven hundred eighty-nine".