3947336677 has 2 divisors, whose sum is σ = 3947336678. Its totient is φ = 3947336676.

The previous prime is 3947336639. The next prime is 3947336681. The reversal of 3947336677 is 7766337493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3862125316 + 85211361 = 62146^2 + 9231^2 .

It is an emirp because it is prime and its reverse (7766337493) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3947336677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3947336077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973668338 + 1973668339.

It is an arithmetic number, because the mean of its divisors is an integer number (1973668339).

Almost surely, 2^3947336677 is an apocalyptic number.

It is an amenable number.

3947336677 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947336677 is an equidigital number, since it uses as much as digits as its factorization.

3947336677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12002256, while the sum is 55.

The square root of 3947336677 is about 62827.8336169567. The cubic root of 3947336677 is about 1580.4037686503.

The spelling of 3947336677 in words is "three billion, nine hundred forty-seven million, three hundred thirty-six thousand, six hundred seventy-seven".