1361815343 has 4 divisors (see below), whose sum is σ = 1556360400. Its totient is φ = 1167270288.

The previous prime is 1361815313. The next prime is 1361815363. The reversal of 1361815343 is 3435181631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361815343 - 2⁸ = 1361815087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361815313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97272518 + ... + 97272531.

It is an arithmetic number, because the mean of its divisors is an integer number (389090100).

Almost surely, 2^1361815343 is an apocalyptic number.

1361815343 is a deficient number, since it is larger than the sum of its proper divisors (194545057).

1361815343 is an equidigital number, since it uses as much as digits as its factorization.

1361815343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194545056.

The product of its digits is 25920, while the sum is 35.

The square root of 1361815343 is about 36902.7823205785. The cubic root of 1361815343 is about 1108.4243919734.

Adding to 1361815343 its reverse (3435181631), we get a palindrome (4796996974).

The spelling of 1361815343 in words is "one billion, three hundred sixty-one million, eight hundred fifteen thousand, three hundred forty-three".