1340241823 has 4 divisors (see below), whose sum is σ = 1346146200. Its totient is φ = 1334337448.

The previous prime is 1340241781. The next prime is 1340241853. The reversal of 1340241823 is 3281420431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3281420431 = 9343 ⋅351217.

It is a cyclic number.

It is not a de Polignac number, because 1340241823 - 2⁹ = 1340241311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340241791 and 1340241800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340241853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2951848 + ... + 2952301.

It is an arithmetic number, because the mean of its divisors is an integer number (336536550).

Almost surely, 2^1340241823 is an apocalyptic number.

1340241823 is a deficient number, since it is larger than the sum of its proper divisors (5904377).

1340241823 is an equidigital number, since it uses as much as digits as its factorization.

1340241823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5904376.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1340241823 is about 36609.3133369092. The cubic root of 1340241823 is about 1102.5400867430.

It can be divided in two parts, 13402 and 41823, that added together give a square (55225 = 235²).

The spelling of 1340241823 in words is "one billion, three hundred forty million, two hundred forty-one thousand, eight hundred twenty-three".