1989504125 has 48 divisors (see below), whose sum is σ = 2950152192. Its totient is φ = 1335012000.

The previous prime is 1989504119. The next prime is 1989504133. The reversal of 1989504125 is 5214059891.

It is not a de Polignac number, because 1989504125 - 2⁴ = 1989504109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 284420 + ... + 291330.

It is an arithmetic number, because the mean of its divisors is an integer number (61461504).

Almost surely, 2^1989504125 is an apocalyptic number.

It is an amenable number.

1989504125 is a deficient number, since it is larger than the sum of its proper divisors (960648067).

1989504125 is an equidigital number, since it uses as much as digits as its factorization.

1989504125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6987 (or 6970 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 44.

The square root of 1989504125 is about 44603.8577367474. The cubic root of 1989504125 is about 1257.7131874960.

The spelling of 1989504125 in words is "one billion, nine hundred eighty-nine million, five hundred four thousand, one hundred twenty-five".