1889090317 has 4 divisors (see below), whose sum is σ = 1929283776. Its totient is φ = 1848896860.

The previous prime is 1889090299. The next prime is 1889090381. The reversal of 1889090317 is 7130909881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1889090317 - 2¹¹ = 1889088269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889090017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20096659 + ... + 20096752.

It is an arithmetic number, because the mean of its divisors is an integer number (482320944).

Almost surely, 2^1889090317 is an apocalyptic number.

It is an amenable number.

1889090317 is a deficient number, since it is larger than the sum of its proper divisors (40193459).

1889090317 is an equidigital number, since it uses as much as digits as its factorization.

1889090317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40193458.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 1889090317 is about 43463.6666308769. Note that the first 4 decimals coincide. The cubic root of 1889090317 is about 1236.1871949781.

The spelling of 1889090317 in words is "one billion, eight hundred eighty-nine million, ninety thousand, three hundred seventeen".