9998749477 has 2 divisors, whose sum is σ = 9998749478. Its totient is φ = 9998749476.

The previous prime is 9998749469. The next prime is 9998749493. The reversal of 9998749477 is 7749478999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8686426401 + 1312323076 = 93201^2 + 36226^2 .

It is a cyclic number.

It is not a de Polignac number, because 9998749477 - 2³ = 9998749469 is a prime.

It is a super-2 number, since 2×9998749477² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9998749457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999374738 + 4999374739.

It is an arithmetic number, because the mean of its divisors is an integer number (4999374739).

Almost surely, 2^9998749477 is an apocalyptic number.

It is an amenable number.

9998749477 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998749477 is an equidigital number, since it uses as much as digits as its factorization.

9998749477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288054144, while the sum is 73.

The square root of 9998749477 is about 99993.7471895118. The cubic root of 9998749477 is about 2154.3448806171.

The spelling of 9998749477 in words is "nine billion, nine hundred ninety-eight million, seven hundred forty-nine thousand, four hundred seventy-seven".