3817424921 has 2 divisors, whose sum is σ = 3817424922. Its totient is φ = 3817424920.

The previous prime is 3817424917. The next prime is 3817424959. The reversal of 3817424921 is 1294247183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2661424921 + 1156000000 = 51589^2 + 34000^2 .

It is an emirp because it is prime and its reverse (1294247183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3817424921 - 2² = 3817424917 is a prime.

It is not a weakly prime, because it can be changed into another prime (3817424321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1908712460 + 1908712461.

It is an arithmetic number, because the mean of its divisors is an integer number (1908712461).

Almost surely, 2^3817424921 is an apocalyptic number.

It is an amenable number.

3817424921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3817424921 is an equidigital number, since it uses as much as digits as its factorization.

3817424921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 3817424921 is about 61785.3131496475. The cubic root of 3817424921 is about 1562.8723271519.

The spelling of 3817424921 in words is "three billion, eight hundred seventeen million, four hundred twenty-four thousand, nine hundred twenty-one".