398967449 has 2 divisors, whose sum is σ = 398967450. Its totient is φ = 398967448.

The previous prime is 398967409. The next prime is 398967461. The reversal of 398967449 is 944769893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315701824 + 83265625 = 17768^2 + 9125^2 .

It is an emirp because it is prime and its reverse (944769893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398967449 is a prime.

It is not a weakly prime, because it can be changed into another prime (398967409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199483724 + 199483725.

It is an arithmetic number, because the mean of its divisors is an integer number (199483725).

Almost surely, 2^398967449 is an apocalyptic number.

It is an amenable number.

398967449 is a deficient number, since it is larger than the sum of its proper divisors (1).

398967449 is an equidigital number, since it uses as much as digits as its factorization.

398967449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 59.

The square root of 398967449 is about 19974.1695446895. The cubic root of 398967449 is about 736.1717616857.

The spelling of 398967449 in words is "three hundred ninety-eight million, nine hundred sixty-seven thousand, four hundred forty-nine".