398095643 has 4 divisors (see below), whose sum is σ = 434286168. Its totient is φ = 361905120.

The previous prime is 398095631. The next prime is 398095669. The reversal of 398095643 is 346590893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398095643 - 2⁸ = 398095387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398095693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18095246 + ... + 18095267.

It is an arithmetic number, because the mean of its divisors is an integer number (108571542).

Almost surely, 2^398095643 is an apocalyptic number.

398095643 is a deficient number, since it is larger than the sum of its proper divisors (36190525).

398095643 is a wasteful number, since it uses less digits than its factorization.

398095643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36190524.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 398095643 is about 19952.3342744652. The cubic root of 398095643 is about 735.6351539953.

The spelling of 398095643 in words is "three hundred ninety-eight million, ninety-five thousand, six hundred forty-three".