3940580689897 has 2 divisors, whose sum is σ = 3940580689898. Its totient is φ = 3940580689896.

The previous prime is 3940580689849. The next prime is 3940580689909. The reversal of 3940580689897 is 7989860850493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2357020197081 + 1583560492816 = 1535259^2 + 1258396^2 .

It is a cyclic number.

It is not a de Polignac number, because 3940580689897 - 2¹⁹ = 3940580165609 is a prime.

It is not a weakly prime, because it can be changed into another prime (3940580689817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970290344948 + 1970290344949.

It is an arithmetic number, because the mean of its divisors is an integer number (1970290344949).

Almost surely, 2^{3940580689897} is an apocalyptic number.

It is an amenable number.

3940580689897 is a deficient number, since it is larger than the sum of its proper divisors (1).

3940580689897 is an equidigital number, since it uses as much as digits as its factorization.

3940580689897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 940584960, while the sum is 76.

The spelling of 3940580689897 in words is "three trillion, nine hundred forty billion, five hundred eighty million, six hundred eighty-nine thousand, eight hundred ninety-seven".