1098438449 has 2 divisors, whose sum is σ = 1098438450. Its totient is φ = 1098438448.

The previous prime is 1098438443. The next prime is 1098438491. The reversal of 1098438449 is 9448348901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1053976225 + 44462224 = 32465^2 + 6668^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098438449 - 2⁴ = 1098438433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1098438397 and 1098438406.

It is not a weakly prime, because it can be changed into another prime (1098438443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549219224 + 549219225.

It is an arithmetic number, because the mean of its divisors is an integer number (549219225).

Almost surely, 2^1098438449 is an apocalyptic number.

It is an amenable number.

1098438449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098438449 is an equidigital number, since it uses as much as digits as its factorization.

1098438449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 1098438449 is about 33142.6982757892. The cubic root of 1098438449 is about 1031.7914119949.

The spelling of 1098438449 in words is "one billion, ninety-eight million, four hundred thirty-eight thousand, four hundred forty-nine".