1311923206 has 16 divisors (see below), whose sum is σ = 2196710208. Its totient is φ = 582460200.

The previous prime is 1311923189. The next prime is 1311923209. The reversal of 1311923206 is 6023291131.

It is a super-2 number, since 2×1311923206² = 3442284996882636872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311923209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692460 + ... + 694351.

It is an arithmetic number, because the mean of its divisors is an integer number (137294388).

Almost surely, 2^1311923206 is an apocalyptic number.

1311923206 is a deficient number, since it is larger than the sum of its proper divisors (884787002).

1311923206 is a wasteful number, since it uses less digits than its factorization.

1311923206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386867.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1311923206 is about 36220.4804772107. The cubic root of 1311923206 is about 1094.7193754169.

The spelling of 1311923206 in words is "one billion, three hundred eleven million, nine hundred twenty-three thousand, two hundred six".