2633681 has 2 divisors, whose sum is σ = 2633682. Its totient is φ = 2633680.

The previous prime is 2633677. The next prime is 2633689. The reversal of 2633681 is 1863362.

2633681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2531281 + 102400 = 1591^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 2633681 - 2² = 2633677 is a prime.

It is a super-2 number, since 2×2633681² = 13872551219522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2633689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1316840 + 1316841.

It is an arithmetic number, because the mean of its divisors is an integer number (1316841).

2^2633681 is an apocalyptic number.

It is an amenable number.

2633681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2633681 is an equidigital number, since it uses as much as digits as its factorization.

2633681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 2633681 is about 1622.8619781115. The cubic root of 2633681 is about 138.0981063915.

The spelling of 2633681 in words is "two million, six hundred thirty-three thousand, six hundred eighty-one".