9401221439 has 2 divisors, whose sum is σ = 9401221440. Its totient is φ = 9401221438.

The previous prime is 9401221433. The next prime is 9401221447. The reversal of 9401221439 is 9341221049.

9401221439 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9401221439 - 2¹⁶ = 9401155903 is a prime.

It is a super-2 number, since 2×9401221439² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9401221399 and 9401221408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9401221433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4700610719 + 4700610720.

It is an arithmetic number, because the mean of its divisors is an integer number (4700610720).

Almost surely, 2^9401221439 is an apocalyptic number.

9401221439 is a deficient number, since it is larger than the sum of its proper divisors (1).

9401221439 is an equidigital number, since it uses as much as digits as its factorization.

9401221439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 9401221439 is about 96959.8960343915. The cubic root of 9401221439 is about 2110.5457015660.

The spelling of 9401221439 in words is "nine billion, four hundred one million, two hundred twenty-one thousand, four hundred thirty-nine".