9999974401 has 2 divisors, whose sum is σ = 9999974402. Its totient is φ = 9999974400.

The previous prime is 9999974371. The next prime is 9999974443. The reversal of 9999974401 is 1044799999.

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., 7929724401 + 2070250000 = 89049^2 + 45500^2 .

It is an emirp because it is prime and its reverse (1044799999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9999974401 - 2⁹ = 9999973889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9999974401.

It is not a weakly prime, because it can be changed into another prime (9999974461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999987200 + 4999987201.

It is an arithmetic number, because the mean of its divisors is an integer number (4999987201).

Almost surely, 2^9999974401 is an apocalyptic number.

It is an amenable number.

9999974401 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999974401 is an equidigital number, since it uses as much as digits as its factorization.

9999974401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6613488, while the sum is 61.

The square root of 9999974401 is about 99999.8720049181. The cubic root of 9999974401 is about 2154.4328516512.

The spelling of 9999974401 in words is "nine billion, nine hundred ninety-nine million, nine hundred seventy-four thousand, four hundred one".