1669860243 has 6 divisors (see below), whose sum is σ = 2412020364. Its totient is φ = 1113240156.

The previous prime is 1669860233. The next prime is 1669860253. The reversal of 1669860243 is 3420689661.

It is an interprime number because it is at equal distance from previous prime (1669860233) and next prime (1669860253).

It is a de Polignac number, because none of the positive numbers 2^k-1669860243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1669860233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92770005 + ... + 92770022.

It is an arithmetic number, because the mean of its divisors is an integer number (402003394).

Almost surely, 2^1669860243 is an apocalyptic number.

1669860243 is a deficient number, since it is larger than the sum of its proper divisors (742160121).

1669860243 is a wasteful number, since it uses less digits than its factorization.

1669860243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185540033 (or 185540030 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 1669860243 is about 40863.9234900419. The cubic root of 1669860243 is about 1186.3878990094.

The spelling of 1669860243 in words is "one billion, six hundred sixty-nine million, eight hundred sixty thousand, two hundred forty-three".