9901443049 has 2 divisors, whose sum is σ = 9901443050. Its totient is φ = 9901443048.

The previous prime is 9901443023. The next prime is 9901443091. The reversal of 9901443049 is 9403441099.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6915585600 + 2985857449 = 83160^2 + 54643^2 .

It is a cyclic number.

It is not a de Polignac number, because 9901443049 - 2⁷ = 9901442921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9901442996 and 9901443014.

It is not a weakly prime, because it can be changed into another prime (9901443449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950721524 + 4950721525.

It is an arithmetic number, because the mean of its divisors is an integer number (4950721525).

Almost surely, 2^9901443049 is an apocalyptic number.

It is an amenable number.

9901443049 is a deficient number, since it is larger than the sum of its proper divisors (1).

9901443049 is an equidigital number, since it uses as much as digits as its factorization.

9901443049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 9901443049 is about 99505.9950404999. The cubic root of 9901443049 is about 2147.3334924656. Note that the first 3 decimals are identical.

The spelling of 9901443049 in words is "nine billion, nine hundred one million, four hundred forty-three thousand, forty-nine".