1900017109 has 2 divisors, whose sum is σ = 1900017110. Its totient is φ = 1900017108.

The previous prime is 1900017107. The next prime is 1900017113. The reversal of 1900017109 is 9017100091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200414609 + 699602500 = 34647^2 + 26450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1900017109 - 2¹ = 1900017107 is a prime.

It is a super-2 number, since 2×1900017109² = 7220130028985435762, which contains 22 as substring.

Together with 1900017107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1900017101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950008554 + 950008555.

It is an arithmetic number, because the mean of its divisors is an integer number (950008555).

Almost surely, 2^1900017109 is an apocalyptic number.

It is an amenable number.

1900017109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900017109 is an equidigital number, since it uses as much as digits as its factorization.

1900017109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 1900017109 is about 43589.1856886545. The cubic root of 1900017109 is about 1238.5660472616.

The spelling of 1900017109 in words is "one billion, nine hundred million, seventeen thousand, one hundred nine".