1219879449 has 12 divisors (see below), whose sum is σ = 1772860336. Its totient is φ = 808262712.

The previous prime is 1219879379. The next prime is 1219879459. The reversal of 1219879449 is 9449789121.

1219879449 is a `hidden beast` number, since 1 + 2 + 198 + 7 + 9 + 449 = 666.

It is not a de Polignac number, because 1219879449 - 2¹¹ = 1219877401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1219879395 and 1219879404.

It is not an unprimeable number, because it can be changed into a prime (1219879459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 414307 + ... + 417240.

Almost surely, 2^1219879449 is an apocalyptic number.

It is an amenable number.

1219879449 is a deficient number, since it is larger than the sum of its proper divisors (552980887).

1219879449 is a wasteful number, since it uses less digits than its factorization.

1219879449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831716 (or 831713 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 1219879449 is about 34926.7726679692. The cubic root of 1219879449 is about 1068.4945343646.

The spelling of 1219879449 in words is "one billion, two hundred nineteen million, eight hundred seventy-nine thousand, four hundred forty-nine".