398000807 has 2 divisors, whose sum is σ = 398000808. Its totient is φ = 398000806.

The previous prime is 398000741. The next prime is 398000839. The reversal of 398000807 is 708000893.

It is a strong prime.

It is an emirp because it is prime and its reverse (708000893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398000807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398002807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199000403 + 199000404.

It is an arithmetic number, because the mean of its divisors is an integer number (199000404).

Almost surely, 2^398000807 is an apocalyptic number.

398000807 is a deficient number, since it is larger than the sum of its proper divisors (1).

398000807 is an equidigital number, since it uses as much as digits as its factorization.

398000807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 398000807 is about 19949.9575688772. The cubic root of 398000807 is about 735.5767340006.

The spelling of 398000807 in words is "three hundred ninety-eight million, eight hundred seven", and thus it is an aban number.