1312809050 has 24 divisors (see below), whose sum is σ = 2790657696. Its totient is φ = 450105840.

The previous prime is 1312809031. The next prime is 1312809073. The reversal of 1312809050 is 509082131.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1875092 + ... + 1875791.

It is an arithmetic number, because the mean of its divisors is an integer number (116277404).

Almost surely, 2^1312809050 is an apocalyptic number.

1312809050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312809050 is an abundant number, since it is smaller than the sum of its proper divisors (1477848646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312809050 is a wasteful number, since it uses less digits than its factorization.

1312809050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750902 (or 3750897 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1312809050 is about 36232.7069096417. The cubic root of 1312809050 is about 1094.9657141256.

The spelling of 1312809050 in words is "one billion, three hundred twelve million, eight hundred nine thousand, fifty".