4649681 has 2 divisors, whose sum is σ = 4649682. Its totient is φ = 4649680.

The previous prime is 4649677. The next prime is 4649683. The reversal of 4649681 is 1869464.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4477456 + 172225 = 2116^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 4649681 - 2² = 4649677 is a prime.

It is a super-2 number, since 2×4649681² = 43239066803522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 4649683, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4649683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2324840 + 2324841.

It is an arithmetic number, because the mean of its divisors is an integer number (2324841).

Almost surely, 2^4649681 is an apocalyptic number.

It is an amenable number.

4649681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4649681 is an equidigital number, since it uses as much as digits as its factorization.

4649681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 4649681 is about 2156.3118976623. The cubic root of 4649681 is about 166.9069365669.

The spelling of 4649681 in words is "four million, six hundred forty-nine thousand, six hundred eighty-one".