1909985163 has 8 divisors (see below), whose sum is σ = 2556331008. Its totient is φ = 1268481384.

The previous prime is 1909985141. The next prime is 1909985171. The reversal of 1909985163 is 3615899091.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1909985163 - 2⁹ = 1909984651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1909985183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209595 + ... + 1211172.

It is an arithmetic number, because the mean of its divisors is an integer number (319541376).

Almost surely, 2^1909985163 is an apocalyptic number.

1909985163 is a deficient number, since it is larger than the sum of its proper divisors (646345845).

1909985163 is a wasteful number, since it uses less digits than its factorization.

1909985163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421033.

The product of its (nonzero) digits is 524880, while the sum is 51.

The square root of 1909985163 is about 43703.3770205461. The cubic root of 1909985163 is about 1240.7282322700.

The spelling of 1909985163 in words is "one billion, nine hundred nine million, nine hundred eighty-five thousand, one hundred sixty-three".