1797320489 has 2 divisors, whose sum is σ = 1797320490. Its totient is φ = 1797320488.

The previous prime is 1797320423. The next prime is 1797320519. The reversal of 1797320489 is 9840237971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1390693264 + 406627225 = 37292^2 + 20165^2 .

It is a cyclic number.

It is not a de Polignac number, because 1797320489 - 2²⁴ = 1780543273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1797320419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 898660244 + 898660245.

It is an arithmetic number, because the mean of its divisors is an integer number (898660245).

Almost surely, 2^1797320489 is an apocalyptic number.

It is an amenable number.

1797320489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1797320489 is an equidigital number, since it uses as much as digits as its factorization.

1797320489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 1797320489 is about 42394.8167704497. The cubic root of 1797320489 is about 1215.8364946453.

The spelling of 1797320489 in words is "one billion, seven hundred ninety-seven million, three hundred twenty thousand, four hundred eighty-nine".