4013643 has 8 divisors (see below), whose sum is σ = 5372928. Its totient is φ = 2665064.

The previous prime is 4013641. The next prime is 4013651. The reversal of 4013643 is 3463104.

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

It is a cyclic number.

It is not a de Polignac number, because 4013643 - 2¹ = 4013641 is a prime.

It is a super-2 number, since 2×4013643² = 32218660262898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4013641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1755 + ... + 3332.

It is an arithmetic number, because the mean of its divisors is an integer number (671616).

Almost surely, 2^4013643 is an apocalyptic number.

4013643 is a deficient number, since it is larger than the sum of its proper divisors (1359285).

4013643 is a wasteful number, since it uses less digits than its factorization.

4013643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 4013643 is about 2003.4078466453. The cubic root of 4013643 is about 158.9203746718.

Adding to 4013643 its reverse (3463104), we get a palindrome (7476747).

It can be divided in two parts, 4013 and 643, that added together give a triangular number (4656 = T₉₆).

The spelling of 4013643 in words is "four million, thirteen thousand, six hundred forty-three".