669371243 has 12 divisors (see below), whose sum is σ = 734043960. Its totient is φ = 608259456.

The previous prime is 669371233. The next prime is 669371257. The reversal of 669371243 is 342173966.

It is not a de Polignac number, because 669371243 - 2⁸ = 669370987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 669371243.

It is not an unprimeable number, because it can be changed into a prime (669371203) 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 in 11 ways as a sum of consecutive naturals, for example, 9113 + ... + 37706.

It is an arithmetic number, because the mean of its divisors is an integer number (61170330).

Almost surely, 2^669371243 is an apocalyptic number.

669371243 is a deficient number, since it is larger than the sum of its proper divisors (64672717).

669371243 is a wasteful number, since it uses less digits than its factorization.

669371243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46894 (or 46865 counting only the distinct ones).

The product of its digits is 163296, while the sum is 41.

The square root of 669371243 is about 25872.2098592293. The cubic root of 669371243 is about 874.7602033502.

The spelling of 669371243 in words is "six hundred sixty-nine million, three hundred seventy-one thousand, two hundred forty-three".