1219473979 has 24 divisors (see below), whose sum is σ = 1330493360. Its totient is φ = 1114394112.

The previous prime is 1219473977. The next prime is 1219474013. The reversal of 1219473979 is 9793749121.

It is not a de Polignac number, because 1219473979 - 2¹ = 1219473977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219473973) 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 23 ways as a sum of consecutive naturals, for example, 3895927 + ... + 3896239.

Almost surely, 2^1219473979 is an apocalyptic number.

1219473979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1219473979 is a deficient number, since it is larger than the sum of its proper divisors (111019381).

1219473979 is an equidigital number, since it uses as much as digits as its factorization.

1219473979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 458 counting only the distinct ones).

The product of its digits is 857304, while the sum is 52.

The square root of 1219473979 is about 34920.9676125963. The cubic root of 1219473979 is about 1068.3761372860.

The spelling of 1219473979 in words is "one billion, two hundred nineteen million, four hundred seventy-three thousand, nine hundred seventy-nine".