2168431949 has 2 divisors, whose sum is σ = 2168431950. Its totient is φ = 2168431948.

The previous prime is 2168431913. The next prime is 2168432003. The reversal of 2168431949 is 9491348612.

2168431949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2154630724 + 13801225 = 46418^2 + 3715^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168431949 - 2¹⁶ = 2168366413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2168431249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084215974 + 1084215975.

It is an arithmetic number, because the mean of its divisors is an integer number (1084215975).

Almost surely, 2^2168431949 is an apocalyptic number.

It is an amenable number.

2168431949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168431949 is an equidigital number, since it uses as much as digits as its factorization.

2168431949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 47.

The square root of 2168431949 is about 46566.4251258350. The cubic root of 2168431949 is about 1294.3406747940.

The spelling of 2168431949 in words is "two billion, one hundred sixty-eight million, four hundred thirty-one thousand, nine hundred forty-nine".