398103551 has 2 divisors, whose sum is σ = 398103552. Its totient is φ = 398103550.

The previous prime is 398103509. The next prime is 398103557. The reversal of 398103551 is 155301893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398103551 - 2¹⁴ = 398087167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398103557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199051775 + 199051776.

It is an arithmetic number, because the mean of its divisors is an integer number (199051776).

Almost surely, 2^398103551 is an apocalyptic number.

398103551 is a deficient number, since it is larger than the sum of its proper divisors (1).

398103551 is an equidigital number, since it uses as much as digits as its factorization.

398103551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 398103551 is about 19952.5324457824. The cubic root of 398103551 is about 735.6400249892.

The spelling of 398103551 in words is "three hundred ninety-eight million, one hundred three thousand, five hundred fifty-one".