1898892117 has 12 divisors (see below), whose sum is σ = 2744471340. Its totient is φ = 1265177088.

The previous prime is 1898892103. The next prime is 1898892137. The reversal of 1898892117 is 7112988981.

It can be written as a sum of positive squares in 2 ways, for example, as 1281568401 + 617323716 = 35799^2 + 24846^2 .

It is not a de Polignac number, because 1898892117 - 2⁴ = 1898892101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898892137) by changing a digit.

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, 46348 + ... + 77109.

It is an arithmetic number, because the mean of its divisors is an integer number (228705945).

Almost surely, 2^1898892117 is an apocalyptic number.

It is an amenable number.

1898892117 is a deficient number, since it is larger than the sum of its proper divisors (845579223).

1898892117 is a wasteful number, since it uses less digits than its factorization.

1898892117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125172 (or 125169 counting only the distinct ones).

The product of its digits is 580608, while the sum is 54.

The square root of 1898892117 is about 43576.2792927528. The cubic root of 1898892117 is about 1238.3215491143.

The spelling of 1898892117 in words is "one billion, eight hundred ninety-eight million, eight hundred ninety-two thousand, one hundred seventeen".