398207273 has 2 divisors, whose sum is σ = 398207274. Its totient is φ = 398207272.

The previous prime is 398207267. The next prime is 398207281. The reversal of 398207273 is 372702893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279658729 + 118548544 = 16723^2 + 10888^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398207273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398207273.

It is not a weakly prime, because it can be changed into another prime (398200273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199103636 + 199103637.

It is an arithmetic number, because the mean of its divisors is an integer number (199103637).

Almost surely, 2^398207273 is an apocalyptic number.

It is an amenable number.

398207273 is a deficient number, since it is larger than the sum of its proper divisors (1).

398207273 is an equidigital number, since it uses as much as digits as its factorization.

398207273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 398207273 is about 19955.1314954324. The cubic root of 398207273 is about 735.7039073876.

The spelling of 398207273 in words is "three hundred ninety-eight million, two hundred seven thousand, two hundred seventy-three".