2168431913 has 2 divisors, whose sum is σ = 2168431914. Its totient is φ = 2168431912.

The previous prime is 2168431901. The next prime is 2168431949. The reversal of 2168431913 is 3191348612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1460233369 + 708198544 = 38213^2 + 26612^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168431913 - 2¹⁰ = 2168430889 is a prime.

It is a super-2 number, since 2×2168431913² = 9404193922633679138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2168436913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084215956 + 1084215957.

It is an arithmetic number, because the mean of its divisors is an integer number (1084215957).

Almost surely, 2^2168431913 is an apocalyptic number.

It is an amenable number.

2168431913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168431913 is an equidigital number, since it uses as much as digits as its factorization.

2168431913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 2168431913 is about 46566.4247392904. The cubic root of 2168431913 is about 1294.3406676312.

The spelling of 2168431913 in words is "two billion, one hundred sixty-eight million, four hundred thirty-one thousand, nine hundred thirteen".