1398120593 has 4 divisors (see below), whose sum is σ = 1398198708. Its totient is φ = 1398042480.

The previous prime is 1398120583. The next prime is 1398120611. The reversal of 1398120593 is 3950218931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 840594049 + 557526544 = 28993^2 + 23612^2 .

It is a cyclic number.

It is not a de Polignac number, because 1398120593 - 2¹² = 1398116497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1398120593.

It is not an unprimeable number, because it can be changed into a prime (1398120583) 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 3 ways as a sum of consecutive naturals, for example, 2603 + ... + 52943.

It is an arithmetic number, because the mean of its divisors is an integer number (349549677).

Almost surely, 2^1398120593 is an apocalyptic number.

It is an amenable number.

1398120593 is a deficient number, since it is larger than the sum of its proper divisors (78115).

1398120593 is an equidigital number, since it uses as much as digits as its factorization.

1398120593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78114.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1398120593 is about 37391.4508009518. The cubic root of 1398120593 is about 1118.1881293813.

The spelling of 1398120593 in words is "one billion, three hundred ninety-eight million, one hundred twenty thousand, five hundred ninety-three".