398797873 has 2 divisors, whose sum is σ = 398797874. Its totient is φ = 398797872.

The previous prime is 398797871. The next prime is 398797901. The reversal of 398797873 is 378797893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393308224 + 5489649 = 19832^2 + 2343^2 .

It is a cyclic number.

It is not a de Polignac number, because 398797873 - 2¹ = 398797871 is a prime.

Together with 398797871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (398797871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199398936 + 199398937.

It is an arithmetic number, because the mean of its divisors is an integer number (199398937).

Almost surely, 2^398797873 is an apocalyptic number.

It is an amenable number.

398797873 is a deficient number, since it is larger than the sum of its proper divisors (1).

398797873 is an equidigital number, since it uses as much as digits as its factorization.

398797873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16003008, while the sum is 61.

The square root of 398797873 is about 19969.9242111732. The cubic root of 398797873 is about 736.0674467816.

The spelling of 398797873 in words is "three hundred ninety-eight million, seven hundred ninety-seven thousand, eight hundred seventy-three".