9144388421 has 16 divisors (see below), whose sum is σ = 10773164160. Its totient is φ = 7597800000.

The previous prime is 9144388397. The next prime is 9144388459. The reversal of 9144388421 is 1248834419.

It is not a de Polignac number, because 9144388421 - 2²² = 9140194117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9146388421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4046 + ... + 135296.

It is an arithmetic number, because the mean of its divisors is an integer number (673322760).

Almost surely, 2^9144388421 is an apocalyptic number.

It is an amenable number.

9144388421 is a deficient number, since it is larger than the sum of its proper divisors (1628775739).

9144388421 is a wasteful number, since it uses less digits than its factorization.

9144388421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131564.

The product of its digits is 221184, while the sum is 44.

The square root of 9144388421 is about 95626.2956565818. The cubic root of 9144388421 is about 2091.1485655916.

The spelling of 9144388421 in words is "nine billion, one hundred forty-four million, three hundred eighty-eight thousand, four hundred twenty-one".