3969658397 has 2 divisors, whose sum is σ = 3969658398. Its totient is φ = 3969658396.

The previous prime is 3969658369. The next prime is 3969658421. The reversal of 3969658397 is 7938569693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3111519961 + 858138436 = 55781^2 + 29294^2 .

It is an emirp because it is prime and its reverse (7938569693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3969658397 - 2⁸ = 3969658141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3969658337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1984829198 + 1984829199.

It is an arithmetic number, because the mean of its divisors is an integer number (1984829199).

Almost surely, 2^3969658397 is an apocalyptic number.

It is an amenable number.

3969658397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3969658397 is an equidigital number, since it uses as much as digits as its factorization.

3969658397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66134880, while the sum is 65.

The square root of 3969658397 is about 63005.2251563313. The cubic root of 3969658397 is about 1583.3771694555.

The spelling of 3969658397 in words is "three billion, nine hundred sixty-nine million, six hundred fifty-eight thousand, three hundred ninety-seven".