1979666383 has 2 divisors, whose sum is σ = 1979666384. Its totient is φ = 1979666382.

The previous prime is 1979666347. The next prime is 1979666443. The reversal of 1979666383 is 3836669791.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1979666383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1979667383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989833191 + 989833192.

It is an arithmetic number, because the mean of its divisors is an integer number (989833192).

Almost surely, 2^1979666383 is an apocalyptic number.

1979666383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979666383 is an equidigital number, since it uses as much as digits as its factorization.

1979666383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 58.

The square root of 1979666383 is about 44493.4420223925. The cubic root of 1979666383 is about 1255.6367055409.

The spelling of 1979666383 in words is "one billion, nine hundred seventy-nine million, six hundred sixty-six thousand, three hundred eighty-three".