2191836701 has 2 divisors, whose sum is σ = 2191836702. Its totient is φ = 2191836700.

The previous prime is 2191836659. The next prime is 2191836709. The reversal of 2191836701 is 1076381912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2157602500 + 34234201 = 46450^2 + 5851^2 .

It is a cyclic number.

It is not a de Polignac number, because 2191836701 - 2¹⁰ = 2191835677 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2191836709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095918350 + 1095918351.

It is an arithmetic number, because the mean of its divisors is an integer number (1095918351).

Almost surely, 2^2191836701 is an apocalyptic number.

It is an amenable number.

2191836701 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191836701 is an equidigital number, since it uses as much as digits as its factorization.

2191836701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 2191836701 is about 46817.0556635079. The cubic root of 2191836701 is about 1298.9807989848.

The spelling of 2191836701 in words is "two billion, one hundred ninety-one million, eight hundred thirty-six thousand, seven hundred one".