3950789608669 has 2 divisors, whose sum is σ = 3950789608670. Its totient is φ = 3950789608668.

The previous prime is 3950789608643. The next prime is 3950789608679. The reversal of 3950789608669 is 9668069870593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2141428343044 + 1809361265625 = 1463362^2 + 1345125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3950789608669 is a prime.

It is a super-2 number, since 2×3950789608669² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3950789608595 and 3950789608604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3950789608679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1975394804334 + 1975394804335.

It is an arithmetic number, because the mean of its divisors is an integer number (1975394804335).

Almost surely, 2^{3950789608669} is an apocalyptic number.

It is an amenable number.

3950789608669 is a deficient number, since it is larger than the sum of its proper divisors (1).

3950789608669 is an equidigital number, since it uses as much as digits as its factorization.

3950789608669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058158080, while the sum is 76.

The spelling of 3950789608669 in words is "three trillion, nine hundred fifty billion, seven hundred eighty-nine million, six hundred eight thousand, six hundred sixty-nine".