3812920128917 has 2 divisors, whose sum is σ = 3812920128918. Its totient is φ = 3812920128916.

The previous prime is 3812920128833. The next prime is 3812920128929. The reversal of 3812920128917 is 7198210292183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2513664386116 + 1299255742801 = 1585454^2 + 1139849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3812920128917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3812920128317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1906460064458 + 1906460064459.

It is an arithmetic number, because the mean of its divisors is an integer number (1906460064459).

Almost surely, 2^{3812920128917} is an apocalyptic number.

It is an amenable number.

3812920128917 is a deficient number, since it is larger than the sum of its proper divisors (1).

3812920128917 is an equidigital number, since it uses as much as digits as its factorization.

3812920128917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 3812920128917 in words is "three trillion, eight hundred twelve billion, nine hundred twenty million, one hundred twenty-eight thousand, nine hundred seventeen".