9144823621 has 4 divisors (see below), whose sum is σ = 9542424672. Its totient is φ = 8747222572.

The previous prime is 9144823613. The next prime is 9144823637. The reversal of 9144823621 is 1263284419.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1263284419 = 2927 ⋅431597.

It is a cyclic number.

It is not a de Polignac number, because 9144823621 - 2³ = 9144823613 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9144023621) 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, 198800491 + ... + 198800536.

It is an arithmetic number, because the mean of its divisors is an integer number (2385606168).

Almost surely, 2^9144823621 is an apocalyptic number.

It is an amenable number.

9144823621 is a deficient number, since it is larger than the sum of its proper divisors (397601051).

9144823621 is a wasteful number, since it uses less digits than its factorization.

9144823621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397601050.

The product of its digits is 82944, while the sum is 40.

The square root of 9144823621 is about 95628.5711542319. The cubic root of 9144823621 is about 2091.1817390665.

The spelling of 9144823621 in words is "nine billion, one hundred forty-four million, eight hundred twenty-three thousand, six hundred twenty-one".