3949647 has 8 divisors (see below), whose sum is σ = 5671344. Its totient is φ = 2430528.

The previous prime is 3949643. The next prime is 3949651. The reversal of 3949647 is 7469493.

3949647 is nontrivially palindromic in base 4.

3949647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3949643) and next prime (3949651).

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

It is not a de Polignac number, because 3949647 - 2² = 3949643 is a prime.

It is a super-2 number, since 2×3949647² = 31199422849218, which contains 22 as substring.

3949647 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3949599 and 3949608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50598 + ... + 50675.

It is an arithmetic number, because the mean of its divisors is an integer number (708918).

Almost surely, 2^3949647 is an apocalyptic number.

3949647 is a deficient number, since it is larger than the sum of its proper divisors (1721697).

3949647 is a wasteful number, since it uses less digits than its factorization.

3949647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101289.

The product of its digits is 163296, while the sum is 42.

The square root of 3949647 is about 1987.3718826631. The cubic root of 3949647 is about 158.0712038197.

The spelling of 3949647 in words is "three million, nine hundred forty-nine thousand, six hundred forty-seven".