1361304311 has 4 divisors (see below), whose sum is σ = 1386989352. Its totient is φ = 1335619272.

The previous prime is 1361304253. The next prime is 1361304313. The reversal of 1361304311 is 1134031631.

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 1361304311 - 2¹⁸ = 1361042167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361304313) 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, 12842441 + ... + 12842546.

It is an arithmetic number, because the mean of its divisors is an integer number (346747338).

Almost surely, 2^1361304311 is an apocalyptic number.

1361304311 is a deficient number, since it is larger than the sum of its proper divisors (25685041).

1361304311 is an equidigital number, since it uses as much as digits as its factorization.

1361304311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25685040.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1361304311 is about 36895.8576401200. The cubic root of 1361304311 is about 1108.2857262810.

Adding to 1361304311 its reverse (1134031631), we get a palindrome (2495335942).

The spelling of 1361304311 in words is "one billion, three hundred sixty-one million, three hundred four thousand, three hundred eleven".