199948930729 has 2 divisors, whose sum is σ = 199948930730. Its totient is φ = 199948930728.

The previous prime is 199948930723. The next prime is 199948930757. The reversal of 199948930729 is 927039849991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197704729600 + 2244201129 = 444640^2 + 47373^2 .

It is a cyclic number.

It is not a de Polignac number, because 199948930729 - 2⁵ = 199948930697 is a prime.

It is not a weakly prime, because it can be changed into another prime (199948930723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99974465364 + 99974465365.

It is an arithmetic number, because the mean of its divisors is an integer number (99974465365).

Almost surely, 2^199948930729 is an apocalyptic number.

It is an amenable number.

199948930729 is a deficient number, since it is larger than the sum of its proper divisors (1).

199948930729 is an equidigital number, since it uses as much as digits as its factorization.

199948930729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79361856, while the sum is 70.

The spelling of 199948930729 in words is "one hundred ninety-nine billion, nine hundred forty-eight million, nine hundred thirty thousand, seven hundred twenty-nine".