4618981 has 4 divisors (see below), whose sum is σ = 4694764. Its totient is φ = 4543200.

The previous prime is 4618979. The next prime is 4618987. The reversal of 4618981 is 1898164.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65025 + 4553956 = 255^2 + 2134^2 .

It is a cyclic number.

It is not a de Polignac number, because 4618981 - 2¹ = 4618979 is a prime.

It is a super-2 number, since 2×4618981² = 42669970956722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4618981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4618987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37800 + ... + 37921.

It is an arithmetic number, because the mean of its divisors is an integer number (1173691).

Almost surely, 2^4618981 is an apocalyptic number.

It is an amenable number.

4618981 is a deficient number, since it is larger than the sum of its proper divisors (75783).

4618981 is an equidigital number, since it uses as much as digits as its factorization.

4618981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75782.

The product of its digits is 13824, while the sum is 37.

The square root of 4618981 is about 2149.1814720958. The cubic root of 4618981 is about 166.5387850139.

The spelling of 4618981 in words is "four million, six hundred eighteen thousand, nine hundred eighty-one".