1098439829 has 4 divisors (see below), whose sum is σ = 1098886476. Its totient is φ = 1097993184.

The previous prime is 1098439813. The next prime is 1098439843. The reversal of 1098439829 is 9289348901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 947100625 + 151339204 = 30775^2 + 12302^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098439829 - 2⁴ = 1098439813 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098439729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219614 + ... + 224559.

It is an arithmetic number, because the mean of its divisors is an integer number (274721619).

Almost surely, 2^1098439829 is an apocalyptic number.

It is an amenable number.

1098439829 is a deficient number, since it is larger than the sum of its proper divisors (446647).

1098439829 is an equidigital number, since it uses as much as digits as its factorization.

1098439829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446646.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 1098439829 is about 33142.7190948480. The cubic root of 1098439829 is about 1031.7918440845.

The spelling of 1098439829 in words is "one billion, ninety-eight million, four hundred thirty-nine thousand, eight hundred twenty-nine".