1898145113 has 4 divisors (see below), whose sum is σ = 1929262308. Its totient is φ = 1867027920.

The previous prime is 1898145083. The next prime is 1898145133. The reversal of 1898145113 is 3115418981.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 734789449 + 1163355664 = 27107^2 + 34108^2 .

It is a cyclic number.

It is not a de Polignac number, because 1898145113 - 2³⁰ = 824403289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1898145133) 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, 15558506 + ... + 15558627.

It is an arithmetic number, because the mean of its divisors is an integer number (482315577).

Almost surely, 2^1898145113 is an apocalyptic number.

It is an amenable number.

1898145113 is a deficient number, since it is larger than the sum of its proper divisors (31117195).

1898145113 is an equidigital number, since it uses as much as digits as its factorization.

1898145113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31117194.

The product of its digits is 34560, while the sum is 41.

The square root of 1898145113 is about 43567.7072267982. The cubic root of 1898145113 is about 1238.1591469662.

The spelling of 1898145113 in words is "one billion, eight hundred ninety-eight million, one hundred forty-five thousand, one hundred thirteen".