1909969503 has 16 divisors (see below), whose sum is σ = 2800874496. Its totient is φ = 1150356960.

The previous prime is 1909969487. The next prime is 1909969553. The reversal of 1909969503 is 3059699091.

It is not a de Polignac number, because 1909969503 - 2⁴ = 1909969487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909969553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519163 + ... + 522828.

It is an arithmetic number, because the mean of its divisors is an integer number (175054656).

Almost surely, 2^1909969503 is an apocalyptic number.

1909969503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1909969503 is a deficient number, since it is larger than the sum of its proper divisors (890904993).

1909969503 is a wasteful number, since it uses less digits than its factorization.

1909969503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042054.

The product of its (nonzero) digits is 590490, while the sum is 51.

The square root of 1909969503 is about 43703.1978578227. The cubic root of 1909969503 is about 1240.7248413436.

The spelling of 1909969503 in words is "one billion, nine hundred nine million, nine hundred sixty-nine thousand, five hundred three".