3971261377 has 2 divisors, whose sum is σ = 3971261378. Its totient is φ = 3971261376.

The previous prime is 3971261369. The next prime is 3971261423. The reversal of 3971261377 is 7731621793.

3971261377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (3971261423) can be obtained adding 3971261377 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3949368336 + 21893041 = 62844^2 + 4679^2 .

It is a cyclic number.

It is not a de Polignac number, because 3971261377 - 2³ = 3971261369 is a prime.

It is a super-2 number, since 2×3971261377² = 31541833848903872258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3971261317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985630688 + 1985630689.

It is an arithmetic number, because the mean of its divisors is an integer number (1985630689).

Almost surely, 2^3971261377 is an apocalyptic number.

It is an amenable number.

3971261377 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971261377 is an equidigital number, since it uses as much as digits as its factorization.

3971261377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 333396, while the sum is 46.

The square root of 3971261377 is about 63017.9448808036. The cubic root of 3971261377 is about 1583.5902675880.

The spelling of 3971261377 in words is "three billion, nine hundred seventy-one million, two hundred sixty-one thousand, three hundred seventy-seven".