3948647447 has 4 divisors (see below), whose sum is σ = 3948800856. Its totient is φ = 3948494040.

The previous prime is 3948647411. The next prime is 3948647467. The reversal of 3948647447 is 7447468493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7447468493 = 41 ⋅181645573.

It is a cyclic number.

It is not a de Polignac number, because 3948647447 - 2¹² = 3948643351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3948647392 and 3948647401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3948647467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27629 + ... + 93062.

It is an arithmetic number, because the mean of its divisors is an integer number (987200214).

Almost surely, 2^3948647447 is an apocalyptic number.

3948647447 is a deficient number, since it is larger than the sum of its proper divisors (153409).

3948647447 is a wasteful number, since it uses less digits than its factorization.

3948647447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153408.

The product of its digits is 16257024, while the sum is 56.

The square root of 3948647447 is about 62838.2641946768. The cubic root of 3948647447 is about 1580.5786812361.

The spelling of 3948647447 in words is "three billion, nine hundred forty-eight million, six hundred forty-seven thousand, four hundred forty-seven".