1603872989 has 2 divisors, whose sum is σ = 1603872990. Its totient is φ = 1603872988.

The previous prime is 1603872983. The next prime is 1603872997. The reversal of 1603872989 is 9892783061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1603361764 + 511225 = 40042^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 1603872989 - 2¹⁶ = 1603807453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1603872989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1603872983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801936494 + 801936495.

It is an arithmetic number, because the mean of its divisors is an integer number (801936495).

Almost surely, 2^1603872989 is an apocalyptic number.

It is an amenable number.

1603872989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1603872989 is an equidigital number, since it uses as much as digits as its factorization.

1603872989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 1603872989 is about 40048.3831009443. The cubic root of 1603872989 is about 1170.5500588870.

The spelling of 1603872989 in words is "one billion, six hundred three million, eight hundred seventy-two thousand, nine hundred eighty-nine".