9441400421 has 2 divisors, whose sum is σ = 9441400422. Its totient is φ = 9441400420.

The previous prime is 9441400379. The next prime is 9441400459. The reversal of 9441400421 is 1240041449.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7515156100 + 1926244321 = 86690^2 + 43889^2 .

It is an emirp because it is prime and its reverse (1240041449) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9441400421 - 2⁶ = 9441400357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9441400471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4720700210 + 4720700211.

It is an arithmetic number, because the mean of its divisors is an integer number (4720700211).

Almost surely, 2^9441400421 is an apocalyptic number.

It is an amenable number.

9441400421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9441400421 is an equidigital number, since it uses as much as digits as its factorization.

9441400421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 9441400421 is about 97166.8689471880. The cubic root of 9441400421 is about 2113.5481149125.

The spelling of 9441400421 in words is "nine billion, four hundred forty-one million, four hundred thousand, four hundred twenty-one".