1198961839 has 8 divisors (see below), whose sum is σ = 1270388880. Its totient is φ = 1127634816.

The previous prime is 1198961821. The next prime is 1198961843. The reversal of 1198961839 is 9381698911.

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 1198961839 - 2⁷ = 1198961711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1198961839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198961899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432 + ... + 48970.

It is an arithmetic number, because the mean of its divisors is an integer number (158798610).

Almost surely, 2^1198961839 is an apocalyptic number.

1198961839 is a deficient number, since it is larger than the sum of its proper divisors (71427041).

1198961839 is a wasteful number, since it uses less digits than its factorization.

1198961839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50009.

The product of its digits is 839808, while the sum is 55.

The square root of 1198961839 is about 34626.0283457401. The cubic root of 1198961839 is about 1062.3520333555.

The spelling of 1198961839 in words is "one billion, one hundred ninety-eight million, nine hundred sixty-one thousand, eight hundred thirty-nine".