3971261423 has 2 divisors, whose sum is σ = 3971261424. Its totient is φ = 3971261422.

The previous prime is 3971261377. The next prime is 3971261449. The reversal of 3971261423 is 3241621793.

It is a strong prime.

It is an emirp because it is prime and its reverse (3241621793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3971261423 - 2¹² = 3971257327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3971261123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985630711 + 1985630712.

It is an arithmetic number, because the mean of its divisors is an integer number (1985630712).

Almost surely, 2^3971261423 is an apocalyptic number.

3971261423 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971261423 is an equidigital number, since it uses as much as digits as its factorization.

3971261423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 3971261423 is about 63017.9452457790. The cubic root of 3971261423 is about 1583.5902737024.

The spelling of 3971261423 in words is "three billion, nine hundred seventy-one million, two hundred sixty-one thousand, four hundred twenty-three".