123165993 has 4 divisors (see below), whose sum is σ = 164221328. Its totient is φ = 82110660.

The previous prime is 123165983. The next prime is 123166013. The reversal of 123165993 is 399561321.

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 not a de Polignac number, because 123165993 - 2⁸ = 123165737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123165983) 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, 20527663 + ... + 20527668.

It is an arithmetic number, because the mean of its divisors is an integer number (41055332).

Almost surely, 2^123165993 is an apocalyptic number.

It is an amenable number.

123165993 is a deficient number, since it is larger than the sum of its proper divisors (41055335).

123165993 is an equidigital number, since it uses as much as digits as its factorization.

123165993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41055334.

The product of its digits is 43740, while the sum is 39.

The square root of 123165993 is about 11098.0175256665. The cubic root of 123165993 is about 497.5425994851.

The spelling of 123165993 in words is "one hundred twenty-three million, one hundred sixty-five thousand, nine hundred ninety-three".