1098408739 has 4 divisors (see below), whose sum is σ = 1099143000. Its totient is φ = 1097674480.

The previous prime is 1098408713. The next prime is 1098408757. The reversal of 1098408739 is 9378048901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9378048901 = 13 ⋅721388377.

It is a cyclic number.

It is not a de Polignac number, because 1098408739 - 2¹⁷ = 1098277667 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1098408692 and 1098408701.

It is not an unprimeable number, because it can be changed into a prime (1098405739) 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 3 ways as a sum of consecutive naturals, for example, 364882 + ... + 367879.

It is an arithmetic number, because the mean of its divisors is an integer number (274785750).

Almost surely, 2^1098408739 is an apocalyptic number.

1098408739 is a deficient number, since it is larger than the sum of its proper divisors (734261).

1098408739 is an equidigital number, since it uses as much as digits as its factorization.

1098408739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734260.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1098408739 is about 33142.2500594030. The cubic root of 1098408739 is about 1031.7821094560.

The spelling of 1098408739 in words is "one billion, ninety-eight million, four hundred eight thousand, seven hundred thirty-nine".