398341679 has 2 divisors, whose sum is σ = 398341680. Its totient is φ = 398341678.

The previous prime is 398341673. The next prime is 398341681. The reversal of 398341679 is 976143893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398341679 - 2⁴ = 398341663 is a prime.

Together with 398341681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398341673) 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, 199170839 + 199170840.

It is an arithmetic number, because the mean of its divisors is an integer number (199170840).

Almost surely, 2^398341679 is an apocalyptic number.

398341679 is a deficient number, since it is larger than the sum of its proper divisors (1).

398341679 is an equidigital number, since it uses as much as digits as its factorization.

398341679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 398341679 is about 19958.4989165017. The cubic root of 398341679 is about 735.7866715684.

The spelling of 398341679 in words is "three hundred ninety-eight million, three hundred forty-one thousand, six hundred seventy-nine".