398111783 has 2 divisors, whose sum is σ = 398111784. Its totient is φ = 398111782.

The previous prime is 398111773. The next prime is 398111837. The reversal of 398111783 is 387111893.

Together with next prime (398111837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398111783 - 2¹⁶ = 398046247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398111783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398111713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199055891 + 199055892.

It is an arithmetic number, because the mean of its divisors is an integer number (199055892).

Almost surely, 2^398111783 is an apocalyptic number.

398111783 is a deficient number, since it is larger than the sum of its proper divisors (1).

398111783 is an equidigital number, since it uses as much as digits as its factorization.

398111783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 398111783 is about 19952.7387343192. The cubic root of 398111783 is about 735.6450954848.

The spelling of 398111783 in words is "three hundred ninety-eight million, one hundred eleven thousand, seven hundred eighty-three".