1098269 has 2 divisors, whose sum is σ = 1098270. Its totient is φ = 1098268.

The previous prime is 1098233. The next prime is 1098287. The reversal of 1098269 is 9628901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 375769 = 850^2 + 613^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1098269 is a prime.

It is a super-2 number, since 2×1098269² = 2412389592722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1098469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549134 + 549135.

It is an arithmetic number, because the mean of its divisors is an integer number (549135).

2^1098269 is an apocalyptic number.

It is an amenable number.

1098269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098269 is an equidigital number, since it uses as much as digits as its factorization.

1098269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1098269 is about 1047.9833013937. The cubic root of 1098269 is about 103.1738353336.

Adding to 1098269 its sum of digits (35), we get a square (1098304 = 1048²).

The spelling of 1098269 in words is "one million, ninety-eight thousand, two hundred sixty-nine".