1197148989 has 8 divisors (see below), whose sum is σ = 1606770112. Its totient is φ = 792813600.

The previous prime is 1197148969. The next prime is 1197148991. The reversal of 1197148989 is 9898417911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1197148989 - 2⁷ = 1197148861 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 (1197148969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320904 + ... + 1321809.

It is an arithmetic number, because the mean of its divisors is an integer number (200846264).

Almost surely, 2^1197148989 is an apocalyptic number.

It is an amenable number.

1197148989 is a deficient number, since it is larger than the sum of its proper divisors (409621123).

1197148989 is a wasteful number, since it uses less digits than its factorization.

1197148989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642867.

The product of its digits is 1306368, while the sum is 57.

The square root of 1197148989 is about 34599.8408811370. The cubic root of 1197148989 is about 1061.8163320252.

The spelling of 1197148989 in words is "one billion, one hundred ninety-seven million, one hundred forty-eight thousand, nine hundred eighty-nine".