599681 has 2 divisors, whose sum is σ = 599682. Its totient is φ = 599680.

The previous prime is 599663. The next prime is 599693. The reversal of 599681 is 186995.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 512656 + 87025 = 716^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 599681 - 2¹⁰ = 598657 is a prime.

It is a super-2 number, since 2×599681² = 719234603522, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (599611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 299840 + 299841.

It is an arithmetic number, because the mean of its divisors is an integer number (299841).

2⁵⁹⁹⁶⁸¹ is an apocalyptic number.

It is an amenable number.

599681 is a deficient number, since it is larger than the sum of its proper divisors (1).

599681 is an equidigital number, since it uses as much as digits as its factorization.

599681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 599681 is about 774.3907282503. The cubic root of 599681 is about 84.3283163792.

Subtracting from 599681 its reverse (186995), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 599681 in words is "five hundred ninety-nine thousand, six hundred eighty-one".