123345001309 has 4 divisors (see below), whose sum is σ = 123448393116. Its totient is φ = 123241609504.

The previous prime is 123345001301. The next prime is 123345001319. The reversal of 123345001309 is 903100543321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63275893209 + 60069108100 = 251547^2 + 245090^2 .

It is a cyclic number.

It is not a de Polignac number, because 123345001309 - 2³ = 123345001301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123345001301) 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, 51694114 + ... + 51696499.

It is an arithmetic number, because the mean of its divisors is an integer number (30862098279).

Almost surely, 2^123345001309 is an apocalyptic number.

It is an amenable number.

123345001309 is a deficient number, since it is larger than the sum of its proper divisors (103391807).

123345001309 is a wasteful number, since it uses less digits than its factorization.

123345001309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103391806.

The product of its (nonzero) digits is 9720, while the sum is 31.

The spelling of 123345001309 in words is "one hundred twenty-three billion, three hundred forty-five million, one thousand, three hundred nine".