1979448697 has 2 divisors, whose sum is σ = 1979448698. Its totient is φ = 1979448696.

The previous prime is 1979448683. The next prime is 1979448739. The reversal of 1979448697 is 7968449791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1893033081 + 86415616 = 43509^2 + 9296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1979448697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1979448617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989724348 + 989724349.

It is an arithmetic number, because the mean of its divisors is an integer number (989724349).

Almost surely, 2^1979448697 is an apocalyptic number.

It is an amenable number.

1979448697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979448697 is an equidigital number, since it uses as much as digits as its factorization.

1979448697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 64.

The square root of 1979448697 is about 44490.9956845203. The cubic root of 1979448697 is about 1255.5906801847.

The spelling of 1979448697 in words is "one billion, nine hundred seventy-nine million, four hundred forty-eight thousand, six hundred ninety-seven".