1197978529 has 16 divisors (see below), whose sum is σ = 1375012224. Its totient is φ = 1041693840.

The previous prime is 1197978511. The next prime is 1197978541. The reversal of 1197978529 is 9258797911.

It is not a de Polignac number, because 1197978529 - 2⁹ = 1197978017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1197978569) 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 15 ways as a sum of consecutive naturals, for example, 11047 + ... + 50179.

It is an arithmetic number, because the mean of its divisors is an integer number (85938264).

Almost surely, 2^1197978529 is an apocalyptic number.

It is an amenable number.

1197978529 is a deficient number, since it is larger than the sum of its proper divisors (177033695).

1197978529 is an equidigital number, since it uses as much as digits as its factorization.

1197978529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39189 (or 39167 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 58.

The square root of 1197978529 is about 34611.8264325938. The cubic root of 1197978529 is about 1062.0615300632.

The spelling of 1197978529 in words is "one billion, one hundred ninety-seven million, nine hundred seventy-eight thousand, five hundred twenty-nine".