3806943961 has 2 divisors, whose sum is σ = 3806943962. Its totient is φ = 3806943960.

The previous prime is 3806943947. The next prime is 3806943967. The reversal of 3806943961 is 1693496083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2689044736 + 1117899225 = 51856^2 + 33435^2 .

It is a cyclic number.

It is not a de Polignac number, because 3806943961 - 2²³ = 3798555353 is a prime.

It is not a weakly prime, because it can be changed into another prime (3806943967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1903471980 + 1903471981.

It is an arithmetic number, because the mean of its divisors is an integer number (1903471981).

Almost surely, 2^3806943961 is an apocalyptic number.

It is an amenable number.

3806943961 is a deficient number, since it is larger than the sum of its proper divisors (1).

3806943961 is an equidigital number, since it uses as much as digits as its factorization.

3806943961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 3806943961 is about 61700.4372837016. The cubic root of 3806943961 is about 1561.4406974795.

The spelling of 3806943961 in words is "three billion, eight hundred six million, nine hundred forty-three thousand, nine hundred sixty-one".