3967776389 has 2 divisors, whose sum is σ = 3967776390. Its totient is φ = 3967776388.

The previous prime is 3967776287. The next prime is 3967776419. The reversal of 3967776389 is 9836777693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3476045764 + 491730625 = 58958^2 + 22175^2 .

It is a cyclic number.

It is not a de Polignac number, because 3967776389 - 2⁸ = 3967776133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3967776089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983888194 + 1983888195.

It is an arithmetic number, because the mean of its divisors is an integer number (1983888195).

Almost surely, 2^3967776389 is an apocalyptic number.

It is an amenable number.

3967776389 is a deficient number, since it is larger than the sum of its proper divisors (1).

3967776389 is an equidigital number, since it uses as much as digits as its factorization.

3967776389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72013536, while the sum is 65.

The square root of 3967776389 is about 62990.2880530007. The cubic root of 3967776389 is about 1583.1269044660.

The spelling of 3967776389 in words is "three billion, nine hundred sixty-seven million, seven hundred seventy-six thousand, three hundred eighty-nine".