3970039817 has 2 divisors, whose sum is σ = 3970039818. Its totient is φ = 3970039816.

The previous prime is 3970039793. The next prime is 3970039819. The reversal of 3970039817 is 7189300793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3233514496 + 736525321 = 56864^2 + 27139^2 .

It is an emirp because it is prime and its reverse (7189300793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3970039817 - 2⁸ = 3970039561 is a prime.

It is a super-2 number, since 2×3970039817² = 31522432297130786978, which contains 22 as substring.

Together with 3970039819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3970039819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985019908 + 1985019909.

It is an arithmetic number, because the mean of its divisors is an integer number (1985019909).

Almost surely, 2^3970039817 is an apocalyptic number.

It is an amenable number.

3970039817 is a deficient number, since it is larger than the sum of its proper divisors (1).

3970039817 is an equidigital number, since it uses as much as digits as its factorization.

3970039817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 3970039817 is about 63008.2519754357. The cubic root of 3970039817 is about 1583.4278801479.

The spelling of 3970039817 in words is "three billion, nine hundred seventy million, thirty-nine thousand, eight hundred seventeen".