669834013 has 2 divisors, whose sum is σ = 669834014. Its totient is φ = 669834012.

The previous prime is 669834001. The next prime is 669834023. The reversal of 669834013 is 310438966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536246649 + 133587364 = 23157^2 + 11558^2 .

It is a cyclic number.

It is not a de Polignac number, because 669834013 - 2⁹ = 669833501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669834023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334917006 + 334917007.

It is an arithmetic number, because the mean of its divisors is an integer number (334917007).

Almost surely, 2^669834013 is an apocalyptic number.

It is an amenable number.

669834013 is a deficient number, since it is larger than the sum of its proper divisors (1).

669834013 is an equidigital number, since it uses as much as digits as its factorization.

669834013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 669834013 is about 25881.1516938486. The cubic root of 669834013 is about 874.9617454840.

The spelling of 669834013 in words is "six hundred sixty-nine million, eight hundred thirty-four thousand, thirteen".