2161793497 has 2 divisors, whose sum is σ = 2161793498. Its totient is φ = 2161793496.

The previous prime is 2161793467. The next prime is 2161793503. The reversal of 2161793497 is 7943971612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2153331216 + 8462281 = 46404^2 + 2909^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161793497 - 2⁷ = 2161793369 is a prime.

It is a super-2 number, since 2×2161793497² = 9346702247342978018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2161793497.

It is not a weakly prime, because it can be changed into another prime (2161793407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080896748 + 1080896749.

It is an arithmetic number, because the mean of its divisors is an integer number (1080896749).

Almost surely, 2^2161793497 is an apocalyptic number.

It is an amenable number.

2161793497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161793497 is an equidigital number, since it uses as much as digits as its factorization.

2161793497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The square root of 2161793497 is about 46495.0911064813. The cubic root of 2161793497 is about 1293.0184902412.

The spelling of 2161793497 in words is "two billion, one hundred sixty-one million, seven hundred ninety-three thousand, four hundred ninety-seven".