1423612643 has 4 divisors (see below), whose sum is σ = 1438289160. Its totient is φ = 1408936128.

The previous prime is 1423612633. The next prime is 1423612651. The reversal of 1423612643 is 3462163241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3462163241 = 8369 ⋅413689.

It is a cyclic number.

It is not a de Polignac number, because 1423612643 - 2¹⁰ = 1423611619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423612613) 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, 7338113 + ... + 7338306.

It is an arithmetic number, because the mean of its divisors is an integer number (359572290).

Almost surely, 2^1423612643 is an apocalyptic number.

1423612643 is a deficient number, since it is larger than the sum of its proper divisors (14676517).

1423612643 is an equidigital number, since it uses as much as digits as its factorization.

1423612643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14676516.

The product of its digits is 20736, while the sum is 32.

The square root of 1423612643 is about 37730.7917091598. The cubic root of 1423612643 is about 1124.9432446759.

Adding to 1423612643 its reverse (3462163241), we get a palindrome (4885775884).

The spelling of 1423612643 in words is "one billion, four hundred twenty-three million, six hundred twelve thousand, six hundred forty-three".