1999694701 has 2 divisors, whose sum is σ = 1999694702. Its totient is φ = 1999694700.

The previous prime is 1999694693. The next prime is 1999694731. The reversal of 1999694701 is 1074969991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1604082601 + 395612100 = 40051^2 + 19890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1999694701 - 2³ = 1999694693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1999694731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999847350 + 999847351.

It is an arithmetic number, because the mean of its divisors is an integer number (999847351).

Almost surely, 2^1999694701 is an apocalyptic number.

It is an amenable number.

1999694701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999694701 is an equidigital number, since it uses as much as digits as its factorization.

1999694701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The square root of 1999694701 is about 44717.9460731371. The cubic root of 1999694701 is about 1259.8569378598.

The spelling of 1999694701 in words is "one billion, nine hundred ninety-nine million, six hundred ninety-four thousand, seven hundred one".