2091611701 has 4 divisors (see below), whose sum is σ = 2093017900. Its totient is φ = 2090205504.

The previous prime is 2091611681. The next prime is 2091611801. The reversal of 2091611701 is 1071161902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1494982225 + 596629476 = 38665^2 + 24426^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091611701 - 2¹⁵ = 2091578933 is a prime.

It is a super-2 number, since 2×2091611701² = 8749679015520226802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2091611701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091611801) 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 in 3 ways as a sum of consecutive naturals, for example, 700866 + ... + 703843.

It is an arithmetic number, because the mean of its divisors is an integer number (523254475).

Almost surely, 2^2091611701 is an apocalyptic number.

It is an amenable number.

2091611701 is a deficient number, since it is larger than the sum of its proper divisors (1406199).

2091611701 is a wasteful number, since it uses less digits than its factorization.

2091611701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406198.

The product of its (nonzero) digits is 756, while the sum is 28.

The square root of 2091611701 is about 45734.1415246859. The cubic root of 2091611701 is about 1278.8718292240.

It can be divided in two parts, 209 and 1611701, that added together give a triangular number (1611910 = T₁₇₉₅).

The spelling of 2091611701 in words is "two billion, ninety-one million, six hundred eleven thousand, seven hundred one".