1200000023309 has 4 divisors (see below), whose sum is σ = 1216901432160. Its totient is φ = 1183098614460.

The previous prime is 1200000023267. The next prime is 1200000023371. The reversal of 1200000023309 is 9033200000021.

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 a de Polignac number, because none of the positive numbers 2^k-1200000023309 is a prime.

It is a super-4 number, since 4×1200000023309⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200000025309) 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, 8450704319 + ... + 8450704460.

It is an arithmetic number, because the mean of its divisors is an integer number (304225358040).

Almost surely, 2^{1200000023309} is an apocalyptic number.

It is an amenable number.

1200000023309 is a deficient number, since it is larger than the sum of its proper divisors (16901408851).

1200000023309 is an equidigital number, since it uses as much as digits as its factorization.

1200000023309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16901408850.

The product of its (nonzero) digits is 324, while the sum is 20.

The spelling of 1200000023309 in words is "one trillion, two hundred billion, twenty-three thousand, three hundred nine".