669735929 has 2 divisors, whose sum is σ = 669735930. Its totient is φ = 669735928.

The previous prime is 669735917. The next prime is 669735977. The reversal of 669735929 is 929537966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 567725929 + 102010000 = 23827^2 + 10100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669735929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (669735029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334867964 + 334867965.

It is an arithmetic number, because the mean of its divisors is an integer number (334867965).

Almost surely, 2^669735929 is an apocalyptic number.

It is an amenable number.

669735929 is a deficient number, since it is larger than the sum of its proper divisors (1).

669735929 is an equidigital number, since it uses as much as digits as its factorization.

669735929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5511240, while the sum is 56.

The square root of 669735929 is about 25879.2567319852. The cubic root of 669735929 is about 874.9190364271.

The spelling of 669735929 in words is "six hundred sixty-nine million, seven hundred thirty-five thousand, nine hundred twenty-nine".