9144392921 has 2 divisors, whose sum is σ = 9144392922. Its totient is φ = 9144392920.

The previous prime is 9144392867. The next prime is 9144393031. The reversal of 9144392921 is 1292934419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8085606400 + 1058786521 = 89920^2 + 32539^2 .

It is a cyclic number.

It is not a de Polignac number, because 9144392921 - 2¹⁰ = 9144391897 is a prime.

It is not a weakly prime, because it can be changed into another prime (9144392821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4572196460 + 4572196461.

It is an arithmetic number, because the mean of its divisors is an integer number (4572196461).

Almost surely, 2^9144392921 is an apocalyptic number.

It is an amenable number.

9144392921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9144392921 is an equidigital number, since it uses as much as digits as its factorization.

9144392921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 9144392921 is about 95626.3191856719. The cubic root of 9144392921 is about 2091.1489086132.

The spelling of 9144392921 in words is "nine billion, one hundred forty-four million, three hundred ninety-two thousand, nine hundred twenty-one".