398328551 has 2 divisors, whose sum is σ = 398328552. Its totient is φ = 398328550.

The previous prime is 398328461. The next prime is 398328577. The reversal of 398328551 is 155823893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398328551 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 (398348551) 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, 199164275 + 199164276.

It is an arithmetic number, because the mean of its divisors is an integer number (199164276).

Almost surely, 2^398328551 is an apocalyptic number.

398328551 is a deficient number, since it is larger than the sum of its proper divisors (1).

398328551 is an equidigital number, since it uses as much as digits as its factorization.

398328551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 44.

The square root of 398328551 is about 19958.1700313431. The cubic root of 398328551 is about 735.7785884629.

The spelling of 398328551 in words is "three hundred ninety-eight million, three hundred twenty-eight thousand, five hundred fifty-one".