1089236657 has 2 divisors, whose sum is σ = 1089236658. Its totient is φ = 1089236656.

The previous prime is 1089236653. The next prime is 1089236711. The reversal of 1089236657 is 7566329801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 861950881 + 227285776 = 29359^2 + 15076^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089236657 - 2² = 1089236653 is a prime.

It is not a weakly prime, because it can be changed into another prime (1089236651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544618328 + 544618329.

It is an arithmetic number, because the mean of its divisors is an integer number (544618329).

Almost surely, 2^1089236657 is an apocalyptic number.

It is an amenable number.

1089236657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089236657 is an equidigital number, since it uses as much as digits as its factorization.

1089236657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 1089236657 is about 33003.5855173343. The cubic root of 1089236657 is about 1028.9021692762.

The spelling of 1089236657 in words is "one billion, eighty-nine million, two hundred thirty-six thousand, six hundred fifty-seven".