3956213777 has 2 divisors, whose sum is σ = 3956213778. Its totient is φ = 3956213776.

The previous prime is 3956213731. The next prime is 3956213783. The reversal of 3956213777 is 7773126593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3837926401 + 118287376 = 61951^2 + 10876^2 .

It is a cyclic number.

It is not a de Polignac number, because 3956213777 - 2¹² = 3956209681 is a prime.

It is not a weakly prime, because it can be changed into another prime (3956213797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978106888 + 1978106889.

It is an arithmetic number, because the mean of its divisors is an integer number (1978106889).

Almost surely, 2^3956213777 is an apocalyptic number.

It is an amenable number.

3956213777 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956213777 is an equidigital number, since it uses as much as digits as its factorization.

3956213777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980, while the sum is 50.

The square root of 3956213777 is about 62898.4401793876. The cubic root of 3956213777 is about 1581.5875962732.

The spelling of 3956213777 in words is "three billion, nine hundred fifty-six million, two hundred thirteen thousand, seven hundred seventy-seven".