1979448687 has 6 divisors (see below), whose sum is σ = 2859203672. Its totient is φ = 1319632452.

The previous prime is 1979448683. The next prime is 1979448697. The reversal of 1979448687 is 7868449791.

1979448687 is a `hidden beast` number, since 1 + 9 + 79 + 4 + 486 + 87 = 666.

It is not a de Polignac number, because 1979448687 - 2² = 1979448683 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 (1979448683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109969363 + ... + 109969380.

Almost surely, 2^1979448687 is an apocalyptic number.

1979448687 is a deficient number, since it is larger than the sum of its proper divisors (879754985).

1979448687 is a wasteful number, since it uses less digits than its factorization.

1979448687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219938749 (or 219938746 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The square root of 1979448687 is about 44490.9955721380. The cubic root of 1979448687 is about 1255.5906780703.

The spelling of 1979448687 in words is "one billion, nine hundred seventy-nine million, four hundred forty-eight thousand, six hundred eighty-seven".