1764989081 has 2 divisors, whose sum is σ = 1764989082. Its totient is φ = 1764989080.

The previous prime is 1764988957. The next prime is 1764989087. The reversal of 1764989081 is 1809894671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1176490000 + 588499081 = 34300^2 + 24259^2 .

It is a cyclic number.

It is not a de Polignac number, because 1764989081 - 2³⁰ = 691247257 is a prime.

It is a super-2 number, since 2×1764989081² = 6230372912098449122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1764989087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 882494540 + 882494541.

It is an arithmetic number, because the mean of its divisors is an integer number (882494541).

Almost surely, 2^1764989081 is an apocalyptic number.

It is an amenable number.

1764989081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1764989081 is an equidigital number, since it uses as much as digits as its factorization.

1764989081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 1764989081 is about 42011.7731237328. The cubic root of 1764989081 is about 1208.5019096247.

The spelling of 1764989081 in words is "one billion, seven hundred sixty-four million, nine hundred eighty-nine thousand, eighty-one".