1827365621 has 2 divisors, whose sum is σ = 1827365622. Its totient is φ = 1827365620.

The previous prime is 1827365597. The next prime is 1827365671. The reversal of 1827365621 is 1265637281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1273704721 + 553660900 = 35689^2 + 23530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1827365621 - 2⁶ = 1827365557 is a prime.

It is a super-2 number, since 2×1827365621² = 6678530225625431282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1827365671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 913682810 + 913682811.

It is an arithmetic number, because the mean of its divisors is an integer number (913682811).

Almost surely, 2^1827365621 is an apocalyptic number.

It is an amenable number.

1827365621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1827365621 is an equidigital number, since it uses as much as digits as its factorization.

1827365621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 1827365621 is about 42747.6972596186. The cubic root of 1827365621 is about 1222.5739843677.

The spelling of 1827365621 in words is "one billion, eight hundred twenty-seven million, three hundred sixty-five thousand, six hundred twenty-one".