398611541 has 2 divisors, whose sum is σ = 398611542. Its totient is φ = 398611540.

The previous prime is 398611517. The next prime is 398611571. The reversal of 398611541 is 145116893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239599441 + 159012100 = 15479^2 + 12610^2 .

It is a cyclic number.

It is not a de Polignac number, because 398611541 - 2¹⁰ = 398610517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 398611495 and 398611504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398611511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199305770 + 199305771.

It is an arithmetic number, because the mean of its divisors is an integer number (199305771).

Almost surely, 2^398611541 is an apocalyptic number.

It is an amenable number.

398611541 is a deficient number, since it is larger than the sum of its proper divisors (1).

398611541 is an equidigital number, since it uses as much as digits as its factorization.

398611541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 398611541 is about 19965.2583504447. The cubic root of 398611541 is about 735.9527902975.

The spelling of 398611541 in words is "three hundred ninety-eight million, six hundred eleven thousand, five hundred forty-one".