681232361 has 2 divisors, whose sum is σ = 681232362. Its totient is φ = 681232360.

The previous prime is 681232339. The next prime is 681232367. The reversal of 681232361 is 163232186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426670336 + 254562025 = 20656^2 + 15955^2 .

It is a cyclic number.

It is not a de Polignac number, because 681232361 - 2¹⁰ = 681231337 is a prime.

It is not a weakly prime, because it can be changed into another prime (681232367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340616180 + 340616181.

It is an arithmetic number, because the mean of its divisors is an integer number (340616181).

Almost surely, 2^681232361 is an apocalyptic number.

It is an amenable number.

681232361 is a deficient number, since it is larger than the sum of its proper divisors (1).

681232361 is an equidigital number, since it uses as much as digits as its factorization.

681232361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 681232361 is about 26100.4283681322. The cubic root of 681232361 is about 879.8968375107.

The spelling of 681232361 in words is "six hundred eighty-one million, two hundred thirty-two thousand, three hundred sixty-one".