398806061 has 2 divisors, whose sum is σ = 398806062. Its totient is φ = 398806060.

The previous prime is 398806033. The next prime is 398806073. The reversal of 398806061 is 160608893.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282576100 + 116229961 = 16810^2 + 10781^2 .

It is an emirp because it is prime and its reverse (160608893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398806061 - 2¹⁸ = 398543917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398806021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199403030 + 199403031.

It is an arithmetic number, because the mean of its divisors is an integer number (199403031).

Almost surely, 2^398806061 is an apocalyptic number.

It is an amenable number.

398806061 is a deficient number, since it is larger than the sum of its proper divisors (1).

398806061 is an equidigital number, since it uses as much as digits as its factorization.

398806061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 398806061 is about 19970.1292184102. The cubic root of 398806061 is about 736.0724843201.

The spelling of 398806061 in words is "three hundred ninety-eight million, eight hundred six thousand, sixty-one".