1309308850 has 12 divisors (see below), whose sum is σ = 2435314554. Its totient is φ = 523723520.

The previous prime is 1309308823. The next prime is 1309308857. The reversal of 1309308850 is 588039031.

It can be written as a sum of positive squares in 3 ways, for example, as 850363921 + 458944929 = 29161^2 + 21423^2 .

It is not an unprimeable number, because it can be changed into a prime (1309308857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13093039 + ... + 13093138.

Almost surely, 2^1309308850 is an apocalyptic number.

1309308850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1309308850 is a deficient number, since it is larger than the sum of its proper divisors (1126005704).

1309308850 is a wasteful number, since it uses less digits than its factorization.

1309308850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26186189 (or 26186184 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1309308850 is about 36184.3730082476. The cubic root of 1309308850 is about 1093.9917186579.

The spelling of 1309308850 in words is "one billion, three hundred nine million, three hundred eight thousand, eight hundred fifty".