606555421 has 2 divisors, whose sum is σ = 606555422. Its totient is φ = 606555420.

The previous prime is 606555401. The next prime is 606555497. The reversal of 606555421 is 124555606.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 560505625 + 46049796 = 23675^2 + 6786^2 .

It is a cyclic number.

It is not a de Polignac number, because 606555421 - 2⁷ = 606555293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (606555401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303277710 + 303277711.

It is an arithmetic number, because the mean of its divisors is an integer number (303277711).

Almost surely, 2^606555421 is an apocalyptic number.

It is an amenable number.

606555421 is a deficient number, since it is larger than the sum of its proper divisors (1).

606555421 is an equidigital number, since it uses as much as digits as its factorization.

606555421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 606555421 is about 24628.3458843667. The cubic root of 606555421 is about 846.4932437873.

The spelling of 606555421 in words is "six hundred six million, five hundred fifty-five thousand, four hundred twenty-one".