3947770993 has 2 divisors, whose sum is σ = 3947770994. Its totient is φ = 3947770992.

The previous prime is 3947770979. The next prime is 3947771041. The reversal of 3947770993 is 3990777493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3911626849 + 36144144 = 62543^2 + 6012^2 .

It is a cyclic number.

It is not a de Polignac number, because 3947770993 - 2¹³ = 3947762801 is a prime.

It is not a weakly prime, because it can be changed into another prime (3947770903) 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, 1973885496 + 1973885497.

It is an arithmetic number, because the mean of its divisors is an integer number (1973885497).

Almost surely, 2^3947770993 is an apocalyptic number.

It is an amenable number.

3947770993 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947770993 is an equidigital number, since it uses as much as digits as its factorization.

3947770993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9001692, while the sum is 58.

The square root of 3947770993 is about 62831.2899199117. The cubic root of 3947770993 is about 1580.4617292051.

The spelling of 3947770993 in words is "three billion, nine hundred forty-seven million, seven hundred seventy thousand, nine hundred ninety-three".