1659223923 has 16 divisors (see below), whose sum is σ = 2542315776. Its totient is φ = 942887520.

The previous prime is 1659223889. The next prime is 1659223927. The reversal of 1659223923 is 3293229561.

It is not a de Polignac number, because 1659223923 - 2⁸ = 1659223667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1659223927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214461 + ... + 222062.

It is an arithmetic number, because the mean of its divisors is an integer number (158894736).

Almost surely, 2^1659223923 is an apocalyptic number.

1659223923 is a deficient number, since it is larger than the sum of its proper divisors (883091853).

1659223923 is a wasteful number, since it uses less digits than its factorization.

1659223923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436714.

The product of its digits is 174960, while the sum is 42.

The square root of 1659223923 is about 40733.5724311041. The cubic root of 1659223923 is about 1183.8635981908.

The spelling of 1659223923 in words is "one billion, six hundred fifty-nine million, two hundred twenty-three thousand, nine hundred twenty-three".