1200134323 has 4 divisors (see below), whose sum is σ = 1200210880. Its totient is φ = 1200057768.

The previous prime is 1200134251. The next prime is 1200134339. The reversal of 1200134323 is 3234310021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3234310021 = 109 ⋅29672569.

It is a cyclic number.

It is not a de Polignac number, because 1200134323 - 2²⁹ = 663263411 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 1200134323.

It is not an unprimeable number, because it can be changed into a prime (1300134323) 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, 5283 + ... + 49276.

It is an arithmetic number, because the mean of its divisors is an integer number (300052720).

Almost surely, 2^1200134323 is an apocalyptic number.

1200134323 is a deficient number, since it is larger than the sum of its proper divisors (76557).

1200134323 is an equidigital number, since it uses as much as digits as its factorization.

1200134323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76556.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1200134323 is about 34642.9548826309. The cubic root of 1200134323 is about 1062.6982175608.

Adding to 1200134323 its reverse (3234310021), we get a palindrome (4434444344).

The spelling of 1200134323 in words is "one billion, two hundred million, one hundred thirty-four thousand, three hundred twenty-three".