3973668817 has 2 divisors, whose sum is σ = 3973668818. Its totient is φ = 3973668816.

The previous prime is 3973668781. The next prime is 3973668847. The reversal of 3973668817 is 7188663793.

Together with previous prime (3973668781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3566597841 + 407070976 = 59721^2 + 20176^2 .

It is a cyclic number.

It is not a de Polignac number, because 3973668817 - 2¹⁹ = 3973144529 is a prime.

It is not a weakly prime, because it can be changed into another prime (3973668847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986834408 + 1986834409.

It is an arithmetic number, because the mean of its divisors is an integer number (1986834409).

Almost surely, 2^3973668817 is an apocalyptic number.

It is an amenable number.

3973668817 is a deficient number, since it is larger than the sum of its proper divisors (1).

3973668817 is an equidigital number, since it uses as much as digits as its factorization.

3973668817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 58.

The square root of 3973668817 is about 63037.0432127015. The cubic root of 3973668817 is about 1583.9102019089.

The spelling of 3973668817 in words is "three billion, nine hundred seventy-three million, six hundred sixty-eight thousand, eight hundred seventeen".