123001009 has 4 divisors (see below), whose sum is σ = 123940080. Its totient is φ = 122061940.

The previous prime is 123000989. The next prime is 123001031. The reversal of 123001009 is 900100321.

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 123001009 - 2⁷ = 123000881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123000983 and 123001001.

It is not an unprimeable number, because it can be changed into a prime (123001049) 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, 469339 + ... + 469600.

It is an arithmetic number, because the mean of its divisors is an integer number (30985020).

Almost surely, 2^123001009 is an apocalyptic number.

It is an amenable number.

123001009 is a deficient number, since it is larger than the sum of its proper divisors (939071).

123001009 is an equidigital number, since it uses as much as digits as its factorization.

123001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939070.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 123001009 is about 11090.5819955492. The cubic root of 123001009 is about 497.3203432008.

The spelling of 123001009 in words is "one hundred twenty-three million, one thousand, nine".