2167428783893 has 2 divisors, whose sum is σ = 2167428783894. Its totient is φ = 2167428783892.

The previous prime is 2167428783881. The next prime is 2167428783931. The reversal of 2167428783893 is 3983878247612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1636334731249 + 531094052644 = 1279193^2 + 728762^2 .

It is a cyclic number.

It is not a de Polignac number, because 2167428783893 - 2³⁰ = 2166355042069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2167428783853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083714391946 + 1083714391947.

It is an arithmetic number, because the mean of its divisors is an integer number (1083714391947).

Almost surely, 2^{2167428783893} is an apocalyptic number.

It is an amenable number.

2167428783893 is a deficient number, since it is larger than the sum of its proper divisors (1).

2167428783893 is an equidigital number, since it uses as much as digits as its factorization.

2167428783893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 195084288, while the sum is 68.

Adding to 2167428783893 its sum of digits (68), we get a square (2167428783961 = 1472219²).

The spelling of 2167428783893 in words is "two trillion, one hundred sixty-seven billion, four hundred twenty-eight million, seven hundred eighty-three thousand, eight hundred ninety-three".