9954421481 has 2 divisors, whose sum is σ = 9954421482. Its totient is φ = 9954421480.

The previous prime is 9954421427. The next prime is 9954421493. The reversal of 9954421481 is 1841244599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7036693225 + 2917728256 = 83885^2 + 54016^2 .

It is a cyclic number.

It is not a de Polignac number, because 9954421481 - 2¹⁰ = 9954420457 is a prime.

It is a super-2 number, since 2×9954421481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9954423481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4977210740 + 4977210741.

It is an arithmetic number, because the mean of its divisors is an integer number (4977210741).

Almost surely, 2^9954421481 is an apocalyptic number.

It is an amenable number.

9954421481 is a deficient number, since it is larger than the sum of its proper divisors (1).

9954421481 is an equidigital number, since it uses as much as digits as its factorization.

9954421481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 47.

The square root of 9954421481 is about 99771.8471363541. The cubic root of 9954421481 is about 2151.1565064022.

The spelling of 9954421481 in words is "nine billion, nine hundred fifty-four million, four hundred twenty-one thousand, four hundred eighty-one".