123673809 has 16 divisors (see below), whose sum is σ = 188633088. Its totient is φ = 70604112.

The previous prime is 123673801. The next prime is 123673811. The reversal of 123673809 is 908376321.

It is not a de Polignac number, because 123673809 - 2³ = 123673801 is a prime.

It is a super-2 number, since 2×123673809² = 30590422065136962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123673801) 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, 27904 + ... + 32030.

It is an arithmetic number, because the mean of its divisors is an integer number (11789568).

Almost surely, 2^123673809 is an apocalyptic number.

It is an amenable number.

123673809 is a deficient number, since it is larger than the sum of its proper divisors (64959279).

123673809 is a wasteful number, since it uses less digits than its factorization.

123673809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5564.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 123673809 is about 11120.8726725918. The cubic root of 123673809 is about 498.2254547625.

The spelling of 123673809 in words is "one hundred twenty-three million, six hundred seventy-three thousand, eight hundred nine".