1089977198 has 4 divisors (see below), whose sum is σ = 1634965800. Its totient is φ = 544988598.

The previous prime is 1089977197. The next prime is 1089977227. The reversal of 1089977198 is 8917799801.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089977197) 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 as a sum of consecutive naturals, namely, 272494298 + ... + 272494301.

It is an arithmetic number, because the mean of its divisors is an integer number (408741450).

Almost surely, 2^1089977198 is an apocalyptic number.

1089977198 is a deficient number, since it is larger than the sum of its proper divisors (544988602).

1089977198 is an equidigital number, since it uses as much as digits as its factorization.

1089977198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544988601.

The product of its (nonzero) digits is 2286144, while the sum is 59.

The square root of 1089977198 is about 33014.8027102995. The cubic root of 1089977198 is about 1029.1352902198.

The spelling of 1089977198 in words is "one billion, eighty-nine million, nine hundred seventy-seven thousand, one hundred ninety-eight".