1098135279 has 8 divisors (see below), whose sum is σ = 1626867120. Its totient is φ = 732090168.

The previous prime is 1098135251. The next prime is 1098135301. The reversal of 1098135279 is 9725318901.

1098135279 is a `hidden beast` number, since 109 + 8 + 13 + 527 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1098135279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098135079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20335812 + ... + 20335865.

It is an arithmetic number, because the mean of its divisors is an integer number (203358390).

Almost surely, 2^1098135279 is an apocalyptic number.

1098135279 is a deficient number, since it is larger than the sum of its proper divisors (528731841).

1098135279 is an equidigital number, since it uses as much as digits as its factorization.

1098135279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40671686 (or 40671680 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 1098135279 is about 33138.1242528904. The cubic root of 1098135279 is about 1031.6964781411.

The spelling of 1098135279 in words is "one billion, ninety-eight million, one hundred thirty-five thousand, two hundred seventy-nine".