3956863973 has 2 divisors, whose sum is σ = 3956863974. Its totient is φ = 3956863972.

The previous prime is 3956863961. The next prime is 3956863991. The reversal of 3956863973 is 3793686593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3760387684 + 196476289 = 61322^2 + 14017^2 .

It is a cyclic number.

It is not a de Polignac number, because 3956863973 - 2⁶ = 3956863909 is a prime.

It is a super-5 number, since 5×3956863973⁵ (a number of 49 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3956863993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978431986 + 1978431987.

It is an arithmetic number, because the mean of its divisors is an integer number (1978431987).

Almost surely, 2^3956863973 is an apocalyptic number.

It is an amenable number.

3956863973 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956863973 is an equidigital number, since it uses as much as digits as its factorization.

3956863973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22044960, while the sum is 59.

The square root of 3956863973 is about 62903.6085848817. The cubic root of 3956863973 is about 1581.6742351369.

The spelling of 3956863973 in words is "three billion, nine hundred fifty-six million, eight hundred sixty-three thousand, nine hundred seventy-three".