3973946447 has 2 divisors, whose sum is σ = 3973946448. Its totient is φ = 3973946446.

The previous prime is 3973946393. The next prime is 3973946453. The reversal of 3973946447 is 7446493793.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3973946447 - 2¹⁸ = 3973684303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3973946392 and 3973946401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3973946047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986973223 + 1986973224.

It is an arithmetic number, because the mean of its divisors is an integer number (1986973224).

Almost surely, 2^3973946447 is an apocalyptic number.

3973946447 is a deficient number, since it is larger than the sum of its proper divisors (1).

3973946447 is an equidigital number, since it uses as much as digits as its factorization.

3973946447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 56.

The square root of 3973946447 is about 63039.2452921194. The cubic root of 3973946447 is about 1583.9470889578.

The spelling of 3973946447 in words is "three billion, nine hundred seventy-three million, nine hundred forty-six thousand, four hundred forty-seven".