669123973 has 4 divisors (see below), whose sum is σ = 764713120. Its totient is φ = 573534828.

The previous prime is 669123971. The next prime is 669123979. The reversal of 669123973 is 379321966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 669123973 - 2¹ = 669123971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669123971) 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 3 ways as a sum of consecutive naturals, for example, 47794563 + ... + 47794576.

It is an arithmetic number, because the mean of its divisors is an integer number (191178280).

Almost surely, 2^669123973 is an apocalyptic number.

It is an amenable number.

669123973 is a deficient number, since it is larger than the sum of its proper divisors (95589147).

669123973 is an equidigital number, since it uses as much as digits as its factorization.

669123973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95589146.

The product of its digits is 367416, while the sum is 46.

The square root of 669123973 is about 25867.4307382855. The cubic root of 669123973 is about 874.6524760874.

It can be divided in two parts, 66912397 and 3, that added together give a square (66912400 = 8180²).

The spelling of 669123973 in words is "six hundred sixty-nine million, one hundred twenty-three thousand, nine hundred seventy-three".