1089308621 has 2 divisors, whose sum is σ = 1089308622. Its totient is φ = 1089308620.

The previous prime is 1089308611. The next prime is 1089308639. The reversal of 1089308621 is 1268039801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887384521 + 201924100 = 29789^2 + 14210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089308621 - 2¹⁸ = 1089046477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089308611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544654310 + 544654311.

It is an arithmetic number, because the mean of its divisors is an integer number (544654311).

Almost surely, 2^1089308621 is an apocalyptic number.

It is an amenable number.

1089308621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089308621 is an equidigital number, since it uses as much as digits as its factorization.

1089308621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1089308621 is about 33004.6757445063. The cubic root of 1089308621 is about 1028.9248280451.

The spelling of 1089308621 in words is "one billion, eighty-nine million, three hundred eight thousand, six hundred twenty-one".