538668149 has 2 divisors, whose sum is σ = 538668150. Its totient is φ = 538668148.

The previous prime is 538668131. The next prime is 538668157. The reversal of 538668149 is 941866835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 535922500 + 2745649 = 23150^2 + 1657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538668149 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 538668097 and 538668106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538668199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269334074 + 269334075.

It is an arithmetic number, because the mean of its divisors is an integer number (269334075).

Almost surely, 2^538668149 is an apocalyptic number.

It is an amenable number.

538668149 is a deficient number, since it is larger than the sum of its proper divisors (1).

538668149 is an equidigital number, since it uses as much as digits as its factorization.

538668149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 50.

The square root of 538668149 is about 23209.2255148680. The cubic root of 538668149 is about 813.6552523745.

The spelling of 538668149 in words is "five hundred thirty-eight million, six hundred sixty-eight thousand, one hundred forty-nine".