9999977441 has 2 divisors, whose sum is σ = 9999977442. Its totient is φ = 9999977440.

The previous prime is 9999977417. The next prime is 9999977453. The reversal of 9999977441 is 1447799999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6069189025 + 3930788416 = 77905^2 + 62696^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999977441 - 2²⁶ = 9932868577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (9999970441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999988720 + 4999988721.

It is an arithmetic number, because the mean of its divisors is an integer number (4999988721).

Almost surely, 2^9999977441 is an apocalyptic number.

It is an amenable number.

9999977441 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999977441 is an equidigital number, since it uses as much as digits as its factorization.

9999977441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46294416, while the sum is 68.

The square root of 9999977441 is about 99999.8872049364. The cubic root of 9999977441 is about 2154.4330699676.

The spelling of 9999977441 in words is "nine billion, nine hundred ninety-nine million, nine hundred seventy-seven thousand, four hundred forty-one".