481685681 has 2 divisors, whose sum is σ = 481685682. Its totient is φ = 481685680.

The previous prime is 481685651. The next prime is 481685683. The reversal of 481685681 is 186586184.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415507456 + 66178225 = 20384^2 + 8135^2 .

It is a cyclic number.

It is not a de Polignac number, because 481685681 - 2¹⁰ = 481684657 is a prime.

It is a super-2 number, since 2×481685681² = 464042190560867522, which contains 22 as substring.

Together with 481685683, 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 (481685683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240842840 + 240842841.

It is an arithmetic number, because the mean of its divisors is an integer number (240842841).

Almost surely, 2^481685681 is an apocalyptic number.

It is an amenable number.

481685681 is a deficient number, since it is larger than the sum of its proper divisors (1).

481685681 is an equidigital number, since it uses as much as digits as its factorization.

481685681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 47.

The square root of 481685681 is about 21947.3388136239. The cubic root of 481685681 is about 783.8890154441.

The spelling of 481685681 in words is "four hundred eighty-one million, six hundred eighty-five thousand, six hundred eighty-one".