3830344187921 has 2 divisors, whose sum is σ = 3830344187922. Its totient is φ = 3830344187920.

The previous prime is 3830344187897. The next prime is 3830344187933. The reversal of 3830344187921 is 1297814430383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2255670568321 + 1574673619600 = 1501889^2 + 1254860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3830344187921 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3830344187941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1915172093960 + 1915172093961.

It is an arithmetic number, because the mean of its divisors is an integer number (1915172093961).

Almost surely, 2^{3830344187921} is an apocalyptic number.

It is an amenable number.

3830344187921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3830344187921 is an equidigital number, since it uses as much as digits as its factorization.

3830344187921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 3830344187921 in words is "three trillion, eight hundred thirty billion, three hundred forty-four million, one hundred eighty-seven thousand, nine hundred twenty-one".