1764006521 has 2 divisors, whose sum is σ = 1764006522. Its totient is φ = 1764006520.

The previous prime is 1764006499. The next prime is 1764006523. The reversal of 1764006521 is 1256004671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1441265296 + 322741225 = 37964^2 + 17965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1764006521 - 2⁶ = 1764006457 is a prime.

It is a super-2 number, since 2×1764006521² = 6223438012261046882, which contains 22 as substring.

Together with 1764006523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1764006523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 882003260 + 882003261.

It is an arithmetic number, because the mean of its divisors is an integer number (882003261).

Almost surely, 2^1764006521 is an apocalyptic number.

It is an amenable number.

1764006521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1764006521 is an equidigital number, since it uses as much as digits as its factorization.

1764006521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1764006521 is about 42000.0776308806. The cubic root of 1764006521 is about 1208.2776124772.

The spelling of 1764006521 in words is "one billion, seven hundred sixty-four million, six thousand, five hundred twenty-one".