1979644099 has 2 divisors, whose sum is σ = 1979644100. Its totient is φ = 1979644098.

The previous prime is 1979644091. The next prime is 1979644133. The reversal of 1979644099 is 9904469791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1979644099 - 2³ = 1979644091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1979644091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989822049 + 989822050.

It is an arithmetic number, because the mean of its divisors is an integer number (989822050).

Almost surely, 2^1979644099 is an apocalyptic number.

1979644099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979644099 is an equidigital number, since it uses as much as digits as its factorization.

1979644099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 1979644099 is about 44493.1916027610. The cubic root of 1979644099 is about 1255.6319941893.

The spelling of 1979644099 in words is "one billion, nine hundred seventy-nine million, six hundred forty-four thousand, ninety-nine".