1198932139 has 4 divisors (see below), whose sum is σ = 1199019024. Its totient is φ = 1198845256.

The previous prime is 1198932121. The next prime is 1198932179. The reversal of 1198932139 is 9312398911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1198932139 - 2⁹ = 1198931627 is a prime.

It is a super-3 number, since 3×1198932139³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1198932179) 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, 17632 + ... + 52045.

It is an arithmetic number, because the mean of its divisors is an integer number (299754756).

Almost surely, 2^1198932139 is an apocalyptic number.

1198932139 is a deficient number, since it is larger than the sum of its proper divisors (86885).

1198932139 is an equidigital number, since it uses as much as digits as its factorization.

1198932139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86884.

The product of its digits is 104976, while the sum is 46.

The square root of 1198932139 is about 34625.5994749549. The cubic root of 1198932139 is about 1062.3432612898.

The spelling of 1198932139 in words is "one billion, one hundred ninety-eight million, nine hundred thirty-two thousand, one hundred thirty-nine".