398599493 has 6 divisors (see below), whose sum is σ = 423426066. Its totient is φ = 375152192.

The previous prime is 398599471. The next prime is 398599507. The reversal of 398599493 is 394995893.

It can be written as a sum of positive squares in 3 ways, for example, as 301439044 + 97160449 = 17362^2 + 9857^2 .

It is not a de Polignac number, because 398599493 - 2¹⁴ = 398583109 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 (398593493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 689330 + ... + 689907.

It is an arithmetic number, because the mean of its divisors is an integer number (70571011).

Almost surely, 2^398599493 is an apocalyptic number.

It is an amenable number.

398599493 is a deficient number, since it is larger than the sum of its proper divisors (24826573).

398599493 is a wasteful number, since it uses less digits than its factorization.

398599493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379271 (or 1379254 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 59.

The square root of 398599493 is about 19964.9566240450. The cubic root of 398599493 is about 735.9453755193.

The spelling of 398599493 in words is "three hundred ninety-eight million, five hundred ninety-nine thousand, four hundred ninety-three".