4609681 has 2 divisors, whose sum is σ = 4609682. Its totient is φ = 4609680.

The previous prime is 4609673. The next prime is 4609687. The reversal of 4609681 is 1869064.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2624400 + 1985281 = 1620^2 + 1409^2 .

It is a cyclic number.

It is not a de Polignac number, because 4609681 - 2³ = 4609673 is a prime.

It is a super-2 number, since 2×4609681² = 42498317843522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4609687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2304840 + 2304841.

It is an arithmetic number, because the mean of its divisors is an integer number (2304841).

Almost surely, 2^4609681 is an apocalyptic number.

It is an amenable number.

4609681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4609681 is an equidigital number, since it uses as much as digits as its factorization.

4609681 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 4609681 is about 2147.0167675172. The cubic root of 4609681 is about 166.4269384588.

The spelling of 4609681 in words is "four million, six hundred nine thousand, six hundred eighty-one".