4890661 has 2 divisors, whose sum is σ = 4890662. Its totient is φ = 4890660.

The previous prime is 4890659. The next prime is 4890667. The reversal of 4890661 is 1660984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4884100 + 6561 = 2210^2 + 81^2 .

It is a cyclic number.

It is not a de Polignac number, because 4890661 - 2¹ = 4890659 is a prime.

Together with 4890659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4890667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2445330 + 2445331.

It is an arithmetic number, because the mean of its divisors is an integer number (2445331).

Almost surely, 2^4890661 is an apocalyptic number.

It is an amenable number.

4890661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4890661 is an equidigital number, since it uses as much as digits as its factorization.

4890661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 4890661 is about 2211.4838909655. The cubic root of 4890661 is about 169.7419499003.

It can be divided in two parts, 48 and 90661, that added together give a palindrome (90709).

The spelling of 4890661 in words is "four million, eight hundred ninety thousand, six hundred sixty-one".