1825665269 has 2 divisors, whose sum is σ = 1825665270. Its totient is φ = 1825665268.

The previous prime is 1825665251. The next prime is 1825665301. The reversal of 1825665269 is 9625665281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1749748900 + 75916369 = 41830^2 + 8713^2 .

It is an emirp because it is prime and its reverse (9625665281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1825665269 - 2¹⁶ = 1825599733 is a prime.

It is a super-2 number, since 2×1825665269² = 6666107348865684722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1825662269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 912832634 + 912832635.

It is an arithmetic number, because the mean of its divisors is an integer number (912832635).

Almost surely, 2^1825665269 is an apocalyptic number.

It is an amenable number.

1825665269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1825665269 is an equidigital number, since it uses as much as digits as its factorization.

1825665269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 50.

The square root of 1825665269 is about 42727.8044018178. The cubic root of 1825665269 is about 1222.1946676068.

The spelling of 1825665269 in words is "one billion, eight hundred twenty-five million, six hundred sixty-five thousand, two hundred sixty-nine".