398411749 has 2 divisors, whose sum is σ = 398411750. Its totient is φ = 398411748.

The previous prime is 398411737. The next prime is 398411789. The reversal of 398411749 is 947114893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237375649 + 161036100 = 15407^2 + 12690^2 .

It is an emirp because it is prime and its reverse (947114893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398411749 - 2¹⁹ = 397887461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398411699 and 398411708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398411729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199205874 + 199205875.

It is an arithmetic number, because the mean of its divisors is an integer number (199205875).

Almost surely, 2^398411749 is an apocalyptic number.

It is an amenable number.

398411749 is a deficient number, since it is larger than the sum of its proper divisors (1).

398411749 is an equidigital number, since it uses as much as digits as its factorization.

398411749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 398411749 is about 19960.2542318478. The cubic root of 398411749 is about 735.8298117101.

The spelling of 398411749 in words is "three hundred ninety-eight million, four hundred eleven thousand, seven hundred forty-nine".