1361661423 has 4 divisors (see below), whose sum is σ = 1815548568. Its totient is φ = 907774280.

The previous prime is 1361661421. The next prime is 1361661437. The reversal of 1361661423 is 3241661631.

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 1361661423 - 2¹ = 1361661421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361661421) 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, 226943568 + ... + 226943573.

It is an arithmetic number, because the mean of its divisors is an integer number (453887142).

Almost surely, 2^1361661423 is an apocalyptic number.

1361661423 is a deficient number, since it is larger than the sum of its proper divisors (453887145).

1361661423 is an equidigital number, since it uses as much as digits as its factorization.

1361661423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453887144.

The product of its digits is 15552, while the sum is 33.

The square root of 1361661423 is about 36900.6967820392. The cubic root of 1361661423 is about 1108.3826302883.

The spelling of 1361661423 in words is "one billion, three hundred sixty-one million, six hundred sixty-one thousand, four hundred twenty-three".