3971453947 has 2 divisors, whose sum is σ = 3971453948. Its totient is φ = 3971453946.

The previous prime is 3971453939. The next prime is 3971453977. The reversal of 3971453947 is 7493541793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3971453947 - 2³ = 3971453939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3971453894 and 3971453903.

It is not a weakly prime, because it can be changed into another prime (3971453977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985726973 + 1985726974.

It is an arithmetic number, because the mean of its divisors is an integer number (1985726974).

Almost surely, 2^3971453947 is an apocalyptic number.

3971453947 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971453947 is an equidigital number, since it uses as much as digits as its factorization.

3971453947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 52.

The square root of 3971453947 is about 63019.4727604095. The cubic root of 3971453947 is about 1583.6158637416.

The spelling of 3971453947 in words is "three billion, nine hundred seventy-one million, four hundred fifty-three thousand, nine hundred forty-seven".