553681 has 2 divisors, whose sum is σ = 553682. Its totient is φ = 553680.

The previous prime is 553667. The next prime is 553687. The reversal of 553681 is 186355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540225 + 13456 = 735^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 553681 - 2⁵ = 553649 is a prime.

It is a super-2 number, since 2×553681² = 613125299522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (553687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276840 + 276841.

It is an arithmetic number, because the mean of its divisors is an integer number (276841).

2⁵⁵³⁶⁸¹ is an apocalyptic number.

It is an amenable number.

553681 is a deficient number, since it is larger than the sum of its proper divisors (1).

553681 is an equidigital number, since it uses as much as digits as its factorization.

553681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 553681 is about 744.0974398558. The cubic root of 553681 is about 82.1145039241.

The spelling of 553681 in words is "five hundred fifty-three thousand, six hundred eighty-one".