1979448685 has 8 divisors (see below), whose sum is σ = 2396359800. Its totient is φ = 1569544704.

The previous prime is 1979448683. The next prime is 1979448697. The reversal of 1979448685 is 5868449791.

It can be written as a sum of positive squares in 4 ways, for example, as 287031364 + 1692417321 = 16942^2 + 41139^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1979448685 - 2¹ = 1979448683 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 1751160 + ... + 1752289.

It is an arithmetic number, because the mean of its divisors is an integer number (299544975).

Almost surely, 2^1979448685 is an apocalyptic number.

It is an amenable number.

1979448685 is a deficient number, since it is larger than the sum of its proper divisors (416911115).

1979448685 is a wasteful number, since it uses less digits than its factorization.

1979448685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503567.

The product of its digits is 17418240, while the sum is 61.

The square root of 1979448685 is about 44490.9955496615. The cubic root of 1979448685 is about 1255.5906776475.

The spelling of 1979448685 in words is "one billion, nine hundred seventy-nine million, four hundred forty-eight thousand, six hundred eighty-five".