398593399 has 4 divisors (see below), whose sum is σ = 398664640. Its totient is φ = 398522160.

The previous prime is 398593397. The next prime is 398593409. The reversal of 398593399 is 993395893.

It is a happy number.

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 398593399 - 2¹ = 398593397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398593397) 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, 26439 + ... + 38680.

It is an arithmetic number, because the mean of its divisors is an integer number (99666160).

Almost surely, 2^398593399 is an apocalyptic number.

398593399 is a deficient number, since it is larger than the sum of its proper divisors (71241).

398593399 is an equidigital number, since it uses as much as digits as its factorization.

398593399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71240.

The product of its digits is 7085880, while the sum is 58.

The square root of 398593399 is about 19964.8040060502. The cubic root of 398593399 is about 735.9416249927.

The spelling of 398593399 in words is "three hundred ninety-eight million, five hundred ninety-three thousand, three hundred ninety-nine".