8153681 has 2 divisors, whose sum is σ = 8153682. Its totient is φ = 8153680.

The previous prime is 8153609. The next prime is 8153683. The reversal of 8153681 is 1863518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7980625 + 173056 = 2825^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 8153681 - 2¹⁸ = 7891537 is a prime.

It is a super-2 number, since 2×8153681² = 132965027699522, which contains 22 as substring.

Together with 8153683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8153683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4076840 + 4076841.

It is an arithmetic number, because the mean of its divisors is an integer number (4076841).

Almost surely, 2^8153681 is an apocalyptic number.

It is an amenable number.

8153681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8153681 is an equidigital number, since it uses as much as digits as its factorization.

8153681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The square root of 8153681 is about 2855.4651109758. The cubic root of 8153681 is about 201.2725607721.

The spelling of 8153681 in words is "eight million, one hundred fifty-three thousand, six hundred eighty-one".