1309863930 has 16 divisors (see below), whose sum is σ = 3143673504. Its totient is φ = 349297040.

The previous prime is 1309863887. The next prime is 1309863931. The reversal of 1309863930 is 393689031.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1309863931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21831036 + ... + 21831095.

It is an arithmetic number, because the mean of its divisors is an integer number (196479594).

Almost surely, 2^1309863930 is an apocalyptic number.

1309863930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1309863930 is an abundant number, since it is smaller than the sum of its proper divisors (1833809574).

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

1309863930 is a wasteful number, since it uses less digits than its factorization.

1309863930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43662141.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 1309863930 is about 36192.0423574023. The cubic root of 1309863930 is about 1094.1462956646.

It can be divided in two parts, 13098 and 63930, that added together give a triangular number (77028 = T₃₉₂).

The spelling of 1309863930 in words is "one billion, three hundred nine million, eight hundred sixty-three thousand, nine hundred thirty".