1097729 has 2 divisors, whose sum is σ = 1097730. Its totient is φ = 1097728.

The previous prime is 1097717. The next prime is 1097743. The reversal of 1097729 is 9277901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1081600 + 16129 = 1040^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097729 - 2¹² = 1093633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1097029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548864 + 548865.

It is an arithmetic number, because the mean of its divisors is an integer number (548865).

It is a Proth number, since it is equal to 67 ⋅ 2¹⁴ + 1 and 67 < 2¹⁴.

2^1097729 is an apocalyptic number.

It is an amenable number.

1097729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097729 is an equidigital number, since it uses as much as digits as its factorization.

1097729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 1097729 is about 1047.7256320240. The cubic root of 1097729 is about 103.1569229606.

The spelling of 1097729 in words is "one million, ninety-seven thousand, seven hundred twenty-nine".