398287207 has 2 divisors, whose sum is σ = 398287208. Its totient is φ = 398287206.

The previous prime is 398287147. The next prime is 398287231. The reversal of 398287207 is 702782893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398287207 - 2¹⁹ = 397762919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398287807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199143603 + 199143604.

It is an arithmetic number, because the mean of its divisors is an integer number (199143604).

Almost surely, 2^398287207 is an apocalyptic number.

398287207 is a deficient number, since it is larger than the sum of its proper divisors (1).

398287207 is an equidigital number, since it uses as much as digits as its factorization.

398287207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 398287207 is about 19957.1342381616. The cubic root of 398287207 is about 735.7531311844.

It can be divided in two parts, 3 and 98287207, that added together give a triangular number (98287210 = T₁₄₀₂₀).

The spelling of 398287207 in words is "three hundred ninety-eight million, two hundred eighty-seven thousand, two hundred seven".