600439981 has 2 divisors, whose sum is σ = 600439982. Its totient is φ = 600439980.

The previous prime is 600439979. The next prime is 600440069. The reversal of 600439981 is 189934006.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373455625 + 226984356 = 19325^2 + 15066^2 .

It is a cyclic number.

It is not a de Polignac number, because 600439981 - 2¹ = 600439979 is a prime.

It is a super-2 number, since 2×600439981² = 721056341566560722, which contains 22 as substring.

Together with 600439979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (600439921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300219990 + 300219991.

It is an arithmetic number, because the mean of its divisors is an integer number (300219991).

Almost surely, 2^600439981 is an apocalyptic number.

It is an amenable number.

600439981 is a deficient number, since it is larger than the sum of its proper divisors (1).

600439981 is an equidigital number, since it uses as much as digits as its factorization.

600439981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 600439981 is about 24503.8768565303. The cubic root of 600439981 is about 843.6387784553.

The spelling of 600439981 in words is "six hundred million, four hundred thirty-nine thousand, nine hundred eighty-one".