3948643 has 4 divisors (see below), whose sum is σ = 4002808. Its totient is φ = 3894480.

The previous prime is 3948619. The next prime is 3948653. The reversal of 3948643 is 3468493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3948643 - 2¹³ = 3940451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3948613) 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, 26973 + ... + 27118.

It is an arithmetic number, because the mean of its divisors is an integer number (1000702).

Almost surely, 2^3948643 is an apocalyptic number.

3948643 is a deficient number, since it is larger than the sum of its proper divisors (54165).

3948643 is an equidigital number, since it uses as much as digits as its factorization.

3948643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54164.

The product of its digits is 62208, while the sum is 37.

The square root of 3948643 is about 1987.1192717097. The cubic root of 3948643 is about 158.0578087882.

The spelling of 3948643 in words is "three million, nine hundred forty-eight thousand, six hundred forty-three".