1398393 has 6 divisors (see below), whose sum is σ = 2019914. Its totient is φ = 932256.

The previous prime is 1398367. The next prime is 1398401. The reversal of 1398393 is 3938931.

It can be written as a sum of positive squares in only one way, i.e., 1327104 + 71289 = 1152^2 + 267^2 .

It is not a de Polignac number, because 1398393 - 2⁶ = 1398329 is a prime.

It is a Duffinian number.

1398393 is a lucky number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1398323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77680 + ... + 77697.

2^1398393 is an apocalyptic number.

It is an amenable number.

1398393 is a deficient number, since it is larger than the sum of its proper divisors (621521).

1398393 is a wasteful number, since it uses less digits than its factorization.

1398393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155383 (or 155380 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 1398393 is about 1182.5366801922. The cubic root of 1398393 is about 111.8260746506.

The spelling of 1398393 in words is "one million, three hundred ninety-eight thousand, three hundred ninety-three".