1020599779 has 2 divisors, whose sum is σ = 1020599780. Its totient is φ = 1020599778.

The previous prime is 1020599771. The next prime is 1020599803. The reversal of 1020599779 is 9779950201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020599779 - 2³ = 1020599771 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020599771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510299889 + 510299890.

It is an arithmetic number, because the mean of its divisors is an integer number (510299890).

Almost surely, 2^1020599779 is an apocalyptic number.

1020599779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020599779 is an equidigital number, since it uses as much as digits as its factorization.

1020599779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 357210, while the sum is 49.

The square root of 1020599779 is about 31946.8273698657. The cubic root of 1020599779 is about 1006.8199752012.

The spelling of 1020599779 in words is "one billion, twenty million, five hundred ninety-nine thousand, seven hundred seventy-nine".