4989641 has 2 divisors, whose sum is σ = 4989642. Its totient is φ = 4989640.

The previous prime is 4989637. The next prime is 4989697. The reversal of 4989641 is 1469894.

4989641 = 1579² + 1580².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2496400 + 2493241 = 1580^2 + 1579^2 .

It is a cyclic number.

It is not a de Polignac number, because 4989641 - 2² = 4989637 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4989541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494820 + 2494821.

It is an arithmetic number, because the mean of its divisors is an integer number (2494821).

Almost surely, 2^4989641 is an apocalyptic number.

4989641 is the 1580-th centered square number.

It is an amenable number.

4989641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4989641 is an equidigital number, since it uses as much as digits as its factorization.

4989641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 4989641 is about 2233.7504336877. The cubic root of 4989641 is about 170.8794220812.

The spelling of 4989641 in words is "four million, nine hundred eighty-nine thousand, six hundred forty-one".