1903489641 has 9 divisors (see below), whose sum is σ = 2749674109. Its totient is φ = 1268905836.

The previous prime is 1903489639. The next prime is 1903489649. The reversal of 1903489641 is 1469843091.

The square root of 1903489641 is 43629.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1903489641 - 2¹ = 1903489639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1903489649) 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 8 ways as a sum of consecutive naturals, for example, 123616 + ... + 138158.

Almost surely, 2^1903489641 is an apocalyptic number.

1903489641 is the 43629-th square number.

1903489641 is the 21815-th centered octagonal number.

It is an amenable number.

1903489641 is a deficient number, since it is larger than the sum of its proper divisors (846184468).

1903489641 is an frugal number, since it uses more digits than its factorization.

1903489641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29092 (or 14546 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The cubic root of 1903489641 is about 1239.3201356817.

Multiplying 1903489641 by its product of nonzero digits (186624), we get a square (355236850761984 = 18847728²).

The spelling of 1903489641 in words is "one billion, nine hundred three million, four hundred eighty-nine thousand, six hundred forty-one".