1200431323 has 16 divisors (see below), whose sum is σ = 1483231680. Its totient is φ = 946077696.

The previous prime is 1200431317. The next prime is 1200431329. The reversal of 1200431323 is 3231340021.

It is an interprime number because it is at equal distance from previous prime (1200431317) and next prime (1200431329).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200431323 is a prime.

It is a super-2 number, since 2×1200431323² = 2882070722479060658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1200431323.

It is not an unprimeable number, because it can be changed into a prime (1200431329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2278 + ... + 49051.

It is an arithmetic number, because the mean of its divisors is an integer number (92701980).

Almost surely, 2^1200431323 is an apocalyptic number.

1200431323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1200431323 is a deficient number, since it is larger than the sum of its proper divisors (282800357).

1200431323 is a wasteful number, since it uses less digits than its factorization.

1200431323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51606.

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

The square root of 1200431323 is about 34647.2412033051. The cubic root of 1200431323 is about 1062.7858731208.

Adding to 1200431323 its reverse (3231340021), we get a palindrome (4431771344).

The spelling of 1200431323 in words is "one billion, two hundred million, four hundred thirty-one thousand, three hundred twenty-three".