398576449 has 2 divisors, whose sum is σ = 398576450. Its totient is φ = 398576448.

The previous prime is 398576411. The next prime is 398576461. The reversal of 398576449 is 944675893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373726224 + 24850225 = 19332^2 + 4985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398576449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398576449.

It is not a weakly prime, because it can be changed into another prime (398576489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199288224 + 199288225.

It is an arithmetic number, because the mean of its divisors is an integer number (199288225).

Almost surely, 2^398576449 is an apocalyptic number.

It is an amenable number.

398576449 is a deficient number, since it is larger than the sum of its proper divisors (1).

398576449 is an equidigital number, since it uses as much as digits as its factorization.

398576449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 55.

The square root of 398576449 is about 19964.3795045075. The cubic root of 398576449 is about 735.9311929857.

The spelling of 398576449 in words is "three hundred ninety-eight million, five hundred seventy-six thousand, four hundred forty-nine".