606413981 has 2 divisors, whose sum is σ = 606413982. Its totient is φ = 606413980.

The previous prime is 606413891. The next prime is 606414043. The reversal of 606413981 is 189314606.

Together with previous prime (606413891) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 599809081 + 6604900 = 24491^2 + 2570^2 .

It is a cyclic number.

It is not a de Polignac number, because 606413981 - 2¹⁰ = 606412957 is a prime.

It is a super-2 number, since 2×606413981² = 735475832704536722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (606413081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303206990 + 303206991.

It is an arithmetic number, because the mean of its divisors is an integer number (303206991).

Almost surely, 2^606413981 is an apocalyptic number.

It is an amenable number.

606413981 is a deficient number, since it is larger than the sum of its proper divisors (1).

606413981 is an equidigital number, since it uses as much as digits as its factorization.

606413981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 606413981 is about 24625.4742289362. The cubic root of 606413981 is about 846.4274419893.

The spelling of 606413981 in words is "six hundred six million, four hundred thirteen thousand, nine hundred eighty-one".