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9996982621 = 61400140961

9996982621 has 8 divisors (see below), whose sum is σ = 10163655288. Its totient is φ = 9830400000.

The previous prime is 9996982613. The next prime is 9996982657. The reversal of 9996982621 is 1262896999.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14175225 + 9982807396 = 3765^2 + 99914^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 10-Lehmer number, since φ(9996982621) divides (9996982621-1)10.

It is a cyclic number.

It is not a de Polignac number, because 9996982621 - 23 = 9996982613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9996982621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9996988621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223581 + ... + 264541.

It is an arithmetic number, because the mean of its divisors is an integer number (1270456911).

Almost surely, 29996982621 is an apocalyptic number.

It is an amenable number.

9996982621 is a deficient number, since it is larger than the sum of its proper divisors (166672667).

9996982621 is a wasteful number, since it uses less digits than its factorization.

9996982621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45023.

The product of its digits is 7558272, while the sum is 61.

The square root of 9996982621 is about 99984.9119667563. The cubic root of 9996982621 is about 2154.2179767005.

The spelling of 9996982621 in words is "nine billion, nine hundred ninety-six million, nine hundred eighty-two thousand, six hundred twenty-one".

Divisors: 1 61 4001 40961 244061 2498621 163884961 9996982621