1423661369 has 8 divisors (see below), whose sum is σ = 1534586760. Its totient is φ = 1312937856.

The previous prime is 1423661353. The next prime is 1423661377. The reversal of 1423661369 is 9631663241.

It can be written as a sum of positive squares in 4 ways, for example, as 27667600 + 1395993769 = 5260^2 + 37363^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1423661369 - 2⁴ = 1423661353 is a prime.

It is a super-2 number, since 2×1423661369² = 4053623387165908322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1423661339) 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 7 ways as a sum of consecutive naturals, for example, 35654 + ... + 64175.

It is an arithmetic number, because the mean of its divisors is an integer number (191823345).

Almost surely, 2^1423661369 is an apocalyptic number.

It is an amenable number.

1423661369 is a deficient number, since it is larger than the sum of its proper divisors (110925391).

1423661369 is a wasteful number, since it uses less digits than its factorization.

1423661369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100939.

The product of its digits is 139968, while the sum is 41.

The square root of 1423661369 is about 37731.4374096721. The cubic root of 1423661369 is about 1124.9560790096.

The spelling of 1423661369 in words is "one billion, four hundred twenty-three million, six hundred sixty-one thousand, three hundred sixty-nine".