9412421391 has 24 divisors (see below), whose sum is σ = 13758947280. Its totient is φ = 6199872000.

The previous prime is 9412421357. The next prime is 9412421393. The reversal of 9412421391 is 1931242149.

It is not a de Polignac number, because 9412421391 - 2⁹ = 9412420879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9412421393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 435775 + ... + 456863.

It is an arithmetic number, because the mean of its divisors is an integer number (573289470).

Almost surely, 2^9412421391 is an apocalyptic number.

9412421391 is a deficient number, since it is larger than the sum of its proper divisors (4346525889).

9412421391 is a wasteful number, since it uses less digits than its factorization.

9412421391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21687 (or 21684 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 9412421391 is about 97017.6344331277. The cubic root of 9412421391 is about 2111.3834873802.

The spelling of 9412421391 in words is "nine billion, four hundred twelve million, four hundred twenty-one thousand, three hundred ninety-one".