1098931639 has 8 divisors (see below), whose sum is σ = 1183748832. Its totient is φ = 1014155040.

The previous prime is 1098931619. The next prime is 1098931649. The reversal of 1098931639 is 9361398901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1098931639 - 2¹⁷ = 1098800567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1098931592 and 1098931601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098931619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68982 + ... + 83404.

It is an arithmetic number, because the mean of its divisors is an integer number (147968604).

Almost surely, 2^1098931639 is an apocalyptic number.

1098931639 is a deficient number, since it is larger than the sum of its proper divisors (84817193).

1098931639 is a wasteful number, since it uses less digits than its factorization.

1098931639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20297.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 1098931639 is about 33150.1378428507. The cubic root of 1098931639 is about 1031.9458108953.

The spelling of 1098931639 in words is "one billion, ninety-eight million, nine hundred thirty-one thousand, six hundred thirty-nine".