3954643 has 36 divisors (see below), whose sum is σ = 5458320. Its totient is φ = 2845920.

The previous prime is 3954637. The next prime is 3954649. The reversal of 3954643 is 3464593.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3954637) and next prime (3954649).

It is not a de Polignac number, because 3954643 - 2⁵ = 3954611 is a prime.

It is a super-3 number, since 3×3954643³ (a number of 21 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

3954643 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3954599 and 3954608.

It is not an unprimeable number, because it can be changed into a prime (3954649) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 136353 + ... + 136381.

It is an arithmetic number, because the mean of its divisors is an integer number (151620).

Almost surely, 2^3954643 is an apocalyptic number.

3954643 is a deficient number, since it is larger than the sum of its proper divisors (1503677).

3954643 is a wasteful number, since it uses less digits than its factorization.

3954643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 70 counting only the distinct ones).

The product of its digits is 38880, while the sum is 34.

The square root of 3954643 is about 1988.6284218023. The cubic root of 3954643 is about 158.1378250467.

The spelling of 3954643 in words is "three million, nine hundred fifty-four thousand, six hundred forty-three".