1909969506 has 24 divisors (see below), whose sum is σ = 4140060444. Its totient is φ = 636380640.

The previous prime is 1909969487. The next prime is 1909969553. The reversal of 1909969506 is 6059699091.

It can be written as a sum of positive squares in 2 ways, for example, as 1906108281 + 3861225 = 43659^2 + 1965^2 .

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, 22096 + ... + 65636.

Almost surely, 2^1909969506 is an apocalyptic number.

1909969506 is an abundant number, since it is smaller than the sum of its proper divisors (2230090938).

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

1909969506 is a wasteful number, since it uses less digits than its factorization.

1909969506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45986 (or 45983 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The square root of 1909969506 is about 43703.1978921451. The cubic root of 1909969506 is about 1240.7248419932.

The spelling of 1909969506 in words is "one billion, nine hundred nine million, nine hundred sixty-nine thousand, five hundred six".