1998925441 has 4 divisors (see below), whose sum is σ = 2018716884. Its totient is φ = 1979134000.

The previous prime is 1998925361. The next prime is 1998925459. The reversal of 1998925441 is 1445298991.

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 1787513841 + 211411600 = 42279^2 + 14540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1998925441 - 2⁹ = 1998924929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1998925241) 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, 9895570 + ... + 9895771.

It is an arithmetic number, because the mean of its divisors is an integer number (504679221).

Almost surely, 2^1998925441 is an apocalyptic number.

It is an amenable number.

1998925441 is a deficient number, since it is larger than the sum of its proper divisors (19791443).

1998925441 is a wasteful number, since it uses less digits than its factorization.

1998925441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19791442.

The product of its digits is 933120, while the sum is 52.

The square root of 1998925441 is about 44709.3440010027. The cubic root of 1998925441 is about 1259.6953662211.

The spelling of 1998925441 in words is "one billion, nine hundred ninety-eight million, nine hundred twenty-five thousand, four hundred forty-one".