1669711123 has 4 divisors (see below), whose sum is σ = 1669829760. Its totient is φ = 1669592488.

The previous prime is 1669711103. The next prime is 1669711157. The reversal of 1669711123 is 3211179661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1669711123 is a prime.

It is a super-2 number, since 2×1669711123² = 5575870468539842258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1669711103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34840 + ... + 67477.

It is an arithmetic number, because the mean of its divisors is an integer number (417457440).

Almost surely, 2^1669711123 is an apocalyptic number.

1669711123 is a deficient number, since it is larger than the sum of its proper divisors (118637).

1669711123 is a wasteful number, since it uses less digits than its factorization.

1669711123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118636.

The product of its digits is 13608, while the sum is 37.

The square root of 1669711123 is about 40862.0988570093. The cubic root of 1669711123 is about 1186.3525827944.

The spelling of 1669711123 in words is "one billion, six hundred sixty-nine million, seven hundred eleven thousand, one hundred twenty-three".