1834661921 has 2 divisors, whose sum is σ = 1834661922. Its totient is φ = 1834661920.

The previous prime is 1834661903. The next prime is 1834661923. The reversal of 1834661921 is 1291664381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1729312225 + 105349696 = 41585^2 + 10264^2 .

It is a cyclic number.

It is not a de Polignac number, because 1834661921 - 2¹⁰ = 1834660897 is a prime.

Together with 1834661923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1834661923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 917330960 + 917330961.

It is an arithmetic number, because the mean of its divisors is an integer number (917330961).

Almost surely, 2^1834661921 is an apocalyptic number.

It is an amenable number.

1834661921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1834661921 is an equidigital number, since it uses as much as digits as its factorization.

1834661921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 1834661921 is about 42832.9536805483. The cubic root of 1834661921 is about 1224.1989867672.

The spelling of 1834661921 in words is "one billion, eight hundred thirty-four million, six hundred sixty-one thousand, nine hundred twenty-one".