1783120489 has 2 divisors, whose sum is σ = 1783120490. Its totient is φ = 1783120488.

The previous prime is 1783120397. The next prime is 1783120511. The reversal of 1783120489 is 9840213871.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1042192089 + 740928400 = 32283^2 + 27220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1783120489 - 2¹⁹ = 1782596201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1783121489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 891560244 + 891560245.

It is an arithmetic number, because the mean of its divisors is an integer number (891560245).

Almost surely, 2^1783120489 is an apocalyptic number.

It is an amenable number.

1783120489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1783120489 is an equidigital number, since it uses as much as digits as its factorization.

1783120489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1783120489 is about 42227.0113671332. The cubic root of 1783120489 is about 1212.6260587257.

The spelling of 1783120489 in words is "one billion, seven hundred eighty-three million, one hundred twenty thousand, four hundred eighty-nine".