3947739446 has 8 divisors (see below), whose sum is σ = 6767553360. Its totient is φ = 1691888328.

The previous prime is 3947739443. The next prime is 3947739449. The reversal of 3947739446 is 6449377493.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3947739443) and next prime (3947739449).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3947739391 and 3947739400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947739443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140990681 + ... + 140990708.

It is an arithmetic number, because the mean of its divisors is an integer number (845944170).

Almost surely, 2^3947739446 is an apocalyptic number.

3947739446 is a deficient number, since it is larger than the sum of its proper divisors (2819813914).

3947739446 is a wasteful number, since it uses less digits than its factorization.

3947739446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281981398.

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

The square root of 3947739446 is about 62831.0388741106. The cubic root of 3947739446 is about 1580.4575193223.

The spelling of 3947739446 in words is "three billion, nine hundred forty-seven million, seven hundred thirty-nine thousand, four hundred forty-six".