3622981 has 4 divisors (see below), whose sum is σ = 3631500. Its totient is φ = 3614464.

The previous prime is 3622979. The next prime is 3622987. The reversal of 3622981 is 1892263.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1892263 = 593 ⋅3191.

It can be written as a sum of positive squares in 2 ways, for example, as 749956 + 2873025 = 866^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 3622981 - 2¹ = 3622979 is a prime.

It is a super-2 number, since 2×3622981² = 26251982652722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3622987) 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, 3586 + ... + 4483.

It is an arithmetic number, because the mean of its divisors is an integer number (907875).

Almost surely, 2^3622981 is an apocalyptic number.

It is an amenable number.

3622981 is a deficient number, since it is larger than the sum of its proper divisors (8519).

3622981 is an equidigital number, since it uses as much as digits as its factorization.

3622981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8518.

The product of its digits is 5184, while the sum is 31.

The square root of 3622981 is about 1903.4129872416. The cubic root of 3622981 is about 153.5873164123.

The spelling of 3622981 in words is "three million, six hundred twenty-two thousand, nine hundred eighty-one".