1197389898 has 16 divisors (see below), whose sum is σ = 2660866560. Its totient is φ = 399129948.

The previous prime is 1197389881. The next prime is 1197389927. The reversal of 1197389898 is 8989837911.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11086890 + ... + 11086997.

It is an arithmetic number, because the mean of its divisors is an integer number (166304160).

Almost surely, 2^1197389898 is an apocalyptic number.

1197389898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1197389898 is an abundant number, since it is smaller than the sum of its proper divisors (1463476662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1197389898 is a wasteful number, since it uses less digits than its factorization.

1197389898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22173898 (or 22173892 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 63.

The square root of 1197389898 is about 34603.3220659520. The cubic root of 1197389898 is about 1061.8875523317.

The spelling of 1197389898 in words is "one billion, one hundred ninety-seven million, three hundred eighty-nine thousand, eight hundred ninety-eight".