1361305769 has 4 divisors (see below), whose sum is σ = 1361736900. Its totient is φ = 1360874640.

The previous prime is 1361305723. The next prime is 1361305789. The reversal of 1361305769 is 9675031631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57229225 + 1304076544 = 7565^2 + 36112^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361305769 - 2¹⁶ = 1361240233 is a prime.

It is a super-2 number, since 2×1361305769² = 3706306793425362722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361305789) 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 in 3 ways as a sum of consecutive naturals, for example, 210794 + ... + 217155.

It is an arithmetic number, because the mean of its divisors is an integer number (340434225).

Almost surely, 2^1361305769 is an apocalyptic number.

It is an amenable number.

1361305769 is a deficient number, since it is larger than the sum of its proper divisors (431131).

1361305769 is an equidigital number, since it uses as much as digits as its factorization.

1361305769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431130.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 1361305769 is about 36895.8773984303. The cubic root of 1361305769 is about 1108.2861219505.

The spelling of 1361305769 in words is "one billion, three hundred sixty-one million, three hundred five thousand, seven hundred sixty-nine".