3981700813 has 2 divisors, whose sum is σ = 3981700814. Its totient is φ = 3981700812.

The previous prime is 3981700757. The next prime is 3981700823. The reversal of 3981700813 is 3180071893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3864238569 + 117462244 = 62163^2 + 10838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3981700813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3981700823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990850406 + 1990850407.

It is an arithmetic number, because the mean of its divisors is an integer number (1990850407).

Almost surely, 2^3981700813 is an apocalyptic number.

It is an amenable number.

3981700813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981700813 is an equidigital number, since it uses as much as digits as its factorization.

3981700813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 3981700813 is about 63100.7195917764. The cubic root of 3981700813 is about 1584.9766721283.

The spelling of 3981700813 in words is "three billion, nine hundred eighty-one million, seven hundred thousand, eight hundred thirteen".