534881681 has 2 divisors, whose sum is σ = 534881682. Its totient is φ = 534881680.

The previous prime is 534881651. The next prime is 534881701. The reversal of 534881681 is 186188435.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 502163281 + 32718400 = 22409^2 + 5720^2 .

It is a cyclic number.

It is not a de Polignac number, because 534881681 - 2⁶ = 534881617 is a prime.

It is a super-2 number, since 2×534881681² = 572196825338771522, 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 (534881621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267440840 + 267440841.

It is an arithmetic number, because the mean of its divisors is an integer number (267440841).

Almost surely, 2^534881681 is an apocalyptic number.

It is an amenable number.

534881681 is a deficient number, since it is larger than the sum of its proper divisors (1).

534881681 is an equidigital number, since it uses as much as digits as its factorization.

534881681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 44.

The square root of 534881681 is about 23127.5091827892. The cubic root of 534881681 is about 811.7442881259.

The spelling of 534881681 in words is "five hundred thirty-four million, eight hundred eighty-one thousand, six hundred eighty-one".