4123309 has 4 divisors (see below), whose sum is σ = 4155904. Its totient is φ = 4090716.

The previous prime is 4123303. The next prime is 4123319. The reversal of 4123309 is 9033214.

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 4123309 - 2⁷ = 4123181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4123309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4123303) 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, 16107 + ... + 16360.

It is an arithmetic number, because the mean of its divisors is an integer number (1038976).

Almost surely, 2^4123309 is an apocalyptic number.

It is an amenable number.

4123309 is a deficient number, since it is larger than the sum of its proper divisors (32595).

4123309 is a wasteful number, since it uses less digits than its factorization.

4123309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32594.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 4123309 is about 2030.5932630638. The cubic root of 4123309 is about 160.3547985932.

It can be divided in two parts, 412 and 3309, that added together give a square (3721 = 61²).

The spelling of 4123309 in words is "four million, one hundred twenty-three thousand, three hundred nine".