398547647 has 2 divisors, whose sum is σ = 398547648. Its totient is φ = 398547646.

The previous prime is 398547601. The next prime is 398547673. The reversal of 398547647 is 746745893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398547647 is a prime.

It is a Chen prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398547697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199273823 + 199273824.

It is an arithmetic number, because the mean of its divisors is an integer number (199273824).

Almost surely, 2^398547647 is an apocalyptic number.

398547647 is a deficient number, since it is larger than the sum of its proper divisors (1).

398547647 is an equidigital number, since it uses as much as digits as its factorization.

398547647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 53.

The square root of 398547647 is about 19963.6581567607. The cubic root of 398547647 is about 735.9134658965.

The spelling of 398547647 in words is "three hundred ninety-eight million, five hundred forty-seven thousand, six hundred forty-seven".