1340403223 has 4 divisors (see below), whose sum is σ = 1398681648. Its totient is φ = 1282124800.

The previous prime is 1340403221. The next prime is 1340403227. The reversal of 1340403223 is 3223040431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3223040431 = 13 ⋅247926187.

It is a cyclic number.

It is not a de Polignac number, because 1340403223 - 2¹ = 1340403221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340403194 and 1340403203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340403221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29139178 + ... + 29139223.

It is an arithmetic number, because the mean of its divisors is an integer number (349670412).

Almost surely, 2^1340403223 is an apocalyptic number.

1340403223 is a deficient number, since it is larger than the sum of its proper divisors (58278425).

1340403223 is an equidigital number, since it uses as much as digits as its factorization.

1340403223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58278424.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 1340403223 is about 36611.5176276537. The cubic root of 1340403223 is about 1102.5843431411.

Adding to 1340403223 its reverse (3223040431), we get a palindrome (4563443654).

The spelling of 1340403223 in words is "one billion, three hundred forty million, four hundred three thousand, two hundred twenty-three".