1098671729 has 2 divisors, whose sum is σ = 1098671730. Its totient is φ = 1098671728.

The previous prime is 1098671719. The next prime is 1098671741. The reversal of 1098671729 is 9271768901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 777294400 + 321377329 = 27880^2 + 17927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1098671729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1098671719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549335864 + 549335865.

It is an arithmetic number, because the mean of its divisors is an integer number (549335865).

Almost surely, 2^1098671729 is an apocalyptic number.

It is an amenable number.

1098671729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098671729 is an equidigital number, since it uses as much as digits as its factorization.

1098671729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 50.

The square root of 1098671729 is about 33146.2174161698. The cubic root of 1098671729 is about 1031.8644487874.

The spelling of 1098671729 in words is "one billion, ninety-eight million, six hundred seventy-one thousand, seven hundred twenty-nine".