2161092709 has 2 divisors, whose sum is σ = 2161092710. Its totient is φ = 2161092708.

The previous prime is 2161092691. The next prime is 2161092727. The reversal of 2161092709 is 9072901612.

It is a balanced prime because it is at equal distance from previous prime (2161092691) and next prime (2161092727).

It can be written as a sum of positive squares in only one way, i.e., 2009728900 + 151363809 = 44830^2 + 12303^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161092709 - 2¹³ = 2161084517 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2168092709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080546354 + 1080546355.

It is an arithmetic number, because the mean of its divisors is an integer number (1080546355).

Almost surely, 2^2161092709 is an apocalyptic number.

It is an amenable number.

2161092709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161092709 is an equidigital number, since it uses as much as digits as its factorization.

2161092709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 2161092709 is about 46487.5543452223. The cubic root of 2161092709 is about 1292.8787559921.

The spelling of 2161092709 in words is "two billion, one hundred sixty-one million, ninety-two thousand, seven hundred nine".