398727893 has 4 divisors (see below), whose sum is σ = 399444300. Its totient is φ = 398011488.

The previous prime is 398727881. The next prime is 398727913.

398727893 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 92582884 + 306145009 = 9622^2 + 17497^2 .

It is a cyclic number.

It is not a de Polignac number, because 398727893 - 2¹⁰ = 398726869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398727853) 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, 357368 + ... + 358481.

It is an arithmetic number, because the mean of its divisors is an integer number (99861075).

Almost surely, 2^398727893 is an apocalyptic number.

It is an amenable number.

398727893 is a deficient number, since it is larger than the sum of its proper divisors (716407).

398727893 is an equidigital number, since it uses as much as digits as its factorization.

398727893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716406.

The product of its digits is 4572288, while the sum is 56.

The square root of 398727893 is about 19968.1719994595. The cubic root of 398727893 is about 736.0243898709.

The spelling of 398727893 in words is "three hundred ninety-eight million, seven hundred twenty-seven thousand, eight hundred ninety-three".