9954991357 has 2 divisors, whose sum is σ = 9954991358. Its totient is φ = 9954991356.

The previous prime is 9954991351. The next prime is 9954991367. The reversal of 9954991357 is 7531994599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6103671876 + 3851319481 = 78126^2 + 62059^2 .

It is an emirp because it is prime and its reverse (7531994599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9954991357 - 2¹¹ = 9954989309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9954991295 and 9954991304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9954991351) 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, 4977495678 + 4977495679.

It is an arithmetic number, because the mean of its divisors is an integer number (4977495679).

Almost surely, 2^9954991357 is an apocalyptic number.

It is an amenable number.

9954991357 is a deficient number, since it is larger than the sum of its proper divisors (1).

9954991357 is an equidigital number, since it uses as much as digits as its factorization.

9954991357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13778100, while the sum is 61.

The square root of 9954991357 is about 99774.7029912893. The cubic root of 9954991357 is about 2151.1975558017.

The spelling of 9954991357 in words is "nine billion, nine hundred fifty-four million, nine hundred ninety-one thousand, three hundred fifty-seven".