1398493 has 2 divisors, whose sum is σ = 1398494. Its totient is φ = 1398492.

The previous prime is 1398473. The next prime is 1398497. The reversal of 1398493 is 3948931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1397124 + 1369 = 1182^2 + 37^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1398493 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398497) 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 as a sum of consecutive naturals, namely, 699246 + 699247.

It is an arithmetic number, because the mean of its divisors is an integer number (699247).

2^1398493 is an apocalyptic number.

It is an amenable number.

1398493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398493 is an equidigital number, since it uses as much as digits as its factorization.

1398493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 1398493 is about 1182.5789614229. The cubic root of 1398493 is about 111.8287401724.

It can be divided in two parts, 1398 and 493, that added together give a triangular number (1891 = T₆₁).

The spelling of 1398493 in words is "one million, three hundred ninety-eight thousand, four hundred ninety-three".