385818149 has 2 divisors, whose sum is σ = 385818150. Its totient is φ = 385818148.

The previous prime is 385818127. The next prime is 385818151. The reversal of 385818149 is 941818583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380445025 + 5373124 = 19505^2 + 2318^2 .

It is a cyclic number.

It is not a de Polignac number, because 385818149 - 2¹² = 385814053 is a prime.

Together with 385818151, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385818049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192909074 + 192909075.

It is an arithmetic number, because the mean of its divisors is an integer number (192909075).

Almost surely, 2^385818149 is an apocalyptic number.

It is an amenable number.

385818149 is a deficient number, since it is larger than the sum of its proper divisors (1).

385818149 is an equidigital number, since it uses as much as digits as its factorization.

385818149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 47.

The square root of 385818149 is about 19642.2541730831. The cubic root of 385818149 is about 727.9935827686.

The spelling of 385818149 in words is "three hundred eighty-five million, eight hundred eighteen thousand, one hundred forty-nine".