3618643 has 4 divisors (see below), whose sum is σ = 4135600. Its totient is φ = 3101688.

The previous prime is 3618631. The next prime is 3618653. The reversal of 3618643 is 3468163.

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 3618643 - 2²¹ = 1521491 is a prime.

It is a super-2 number, since 2×3618643² = 26189154322898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3618653) 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, 258468 + ... + 258481.

It is an arithmetic number, because the mean of its divisors is an integer number (1033900).

Almost surely, 2^3618643 is an apocalyptic number.

3618643 is a deficient number, since it is larger than the sum of its proper divisors (516957).

3618643 is an equidigital number, since it uses as much as digits as its factorization.

3618643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516956.

The product of its digits is 10368, while the sum is 31.

The square root of 3618643 is about 1902.2731139350. The cubic root of 3618643 is about 153.5259923376.

The spelling of 3618643 in words is "three million, six hundred eighteen thousand, six hundred forty-three".