1834218149 has 2 divisors, whose sum is σ = 1834218150. Its totient is φ = 1834218148.

The previous prime is 1834218091. The next prime is 1834218157. The reversal of 1834218149 is 9418124381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1337730625 + 496487524 = 36575^2 + 22282^2 .

It is an emirp because it is prime and its reverse (9418124381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1834218149 - 2⁸ = 1834217893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1834218049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 917109074 + 917109075.

It is an arithmetic number, because the mean of its divisors is an integer number (917109075).

Almost surely, 2^1834218149 is an apocalyptic number.

It is an amenable number.

1834218149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1834218149 is an equidigital number, since it uses as much as digits as its factorization.

1834218149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 41.

The square root of 1834218149 is about 42827.7731034431. The cubic root of 1834218149 is about 1224.1002748402.

The spelling of 1834218149 in words is "one billion, eight hundred thirty-four million, two hundred eighteen thousand, one hundred forty-nine".