1198938487 has 4 divisors (see below), whose sum is σ = 1199011176. Its totient is φ = 1198865800.

The previous prime is 1198938479. The next prime is 1198938529. The reversal of 1198938487 is 7848398911.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7848398911 = 38609 ⋅203279.

It is a cyclic number.

It is not a de Polignac number, because 1198938487 - 2³ = 1198938479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198938887) 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 3 ways as a sum of consecutive naturals, for example, 1608 + ... + 48994.

It is an arithmetic number, because the mean of its divisors is an integer number (299752794).

Almost surely, 2^1198938487 is an apocalyptic number.

1198938487 is a deficient number, since it is larger than the sum of its proper divisors (72689).

1198938487 is an equidigital number, since it uses as much as digits as its factorization.

1198938487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72688.

The product of its digits is 3483648, while the sum is 58.

The square root of 1198938487 is about 34625.6911411166. The cubic root of 1198938487 is about 1062.3451362203.

The spelling of 1198938487 in words is "one billion, one hundred ninety-eight million, nine hundred thirty-eight thousand, four hundred eighty-seven".