1098915687 has 16 divisors (see below), whose sum is σ = 1633171680. Its totient is φ = 730293696.

The previous prime is 1098915659. The next prime is 1098915731. The reversal of 1098915687 is 7865198901.

It is not a de Polignac number, because 1098915687 - 2¹¹ = 1098913639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098915607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55638 + ... + 72755.

It is an arithmetic number, because the mean of its divisors is an integer number (102073230).

Almost surely, 2^1098915687 is an apocalyptic number.

1098915687 is a deficient number, since it is larger than the sum of its proper divisors (534255993).

1098915687 is a wasteful number, since it uses less digits than its factorization.

1098915687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128719 (or 128713 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The square root of 1098915687 is about 33149.8972396597. The cubic root of 1098915687 is about 1031.9408176580.

The spelling of 1098915687 in words is "one billion, ninety-eight million, nine hundred fifteen thousand, six hundred eighty-seven".