1309391070 has 32 divisors (see below), whose sum is σ = 3384273312. Its totient is φ = 322311552.

The previous prime is 1309391021. The next prime is 1309391087. The reversal of 1309391070 is 701939031.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 1678317 + ... + 1679096.

It is an arithmetic number, because the mean of its divisors is an integer number (105758541).

Almost surely, 2^1309391070 is an apocalyptic number.

1309391070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1309391070 is an abundant number, since it is smaller than the sum of its proper divisors (2074882242).

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

1309391070 is a wasteful number, since it uses less digits than its factorization.

1309391070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3357436.

The product of its (nonzero) digits is 5103, while the sum is 33.

The square root of 1309391070 is about 36185.5091162194. The cubic root of 1309391070 is about 1094.0146177919.

The spelling of 1309391070 in words is "one billion, three hundred nine million, three hundred ninety-one thousand, seventy".