398240599 has 2 divisors, whose sum is σ = 398240600. Its totient is φ = 398240598.

The previous prime is 398240597. The next prime is 398240603. The reversal of 398240599 is 995042893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398240599 - 2¹ = 398240597 is a prime.

Together with 398240597, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398240597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199120299 + 199120300.

It is an arithmetic number, because the mean of its divisors is an integer number (199120300).

Almost surely, 2^398240599 is an apocalyptic number.

398240599 is a deficient number, since it is larger than the sum of its proper divisors (1).

398240599 is an equidigital number, since it uses as much as digits as its factorization.

398240599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 398240599 is about 19955.9665012748. The cubic root of 398240599 is about 735.7244305223.

The spelling of 398240599 in words is "three hundred ninety-eight million, two hundred forty thousand, five hundred ninety-nine".