2101807693 has 2 divisors, whose sum is σ = 2101807694.
Its totient is φ = 2101807692.
The previous prime is 2101807663. The next prime is 2101807769. The reversal of 2101807693 is 3967081012.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 2099289124 + 2518569 = 45818^2 + 1587^2
It is a cyclic number.
It is not a de Polignac number, because 2101807693 - 25 = 2101807661 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2101807613) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050903846 + 1050903847.
It is an arithmetic number, because the mean of its divisors is an integer number (1050903847).
Almost surely, 22101807693 is an apocalyptic number.
It is an amenable number.
2101807693 is a deficient number, since it is larger than the sum of its proper divisors (1).
2101807693 is an equidigital number, since it uses as much as digits as its factorization.
2101807693 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 18144, while the sum is 37.
The square root of 2101807693 is about 45845.4762544790.
The cubic root of 2101807693 is about 1280.9465030962.
It can be divided in two parts, 2101807 and 693, that added together give a square (2102500 = 14502).
The spelling of 2101807693 in words is "two billion, one hundred one million, eight hundred seven thousand, six hundred ninety-three".