9951044989 has 2 divisors, whose sum is σ = 9951044990. Its totient is φ = 9951044988.

The previous prime is 9951044977. The next prime is 9951045029. The reversal of 9951044989 is 9894401599.

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., 9672722500 + 278322489 = 98350^2 + 16683^2 .

It is a cyclic number.

It is not a de Polignac number, because 9951044989 - 2⁷ = 9951044861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9951044189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4975522494 + 4975522495.

It is an arithmetic number, because the mean of its divisors is an integer number (4975522495).

Almost surely, 2^9951044989 is an apocalyptic number.

It is an amenable number.

9951044989 is a deficient number, since it is larger than the sum of its proper divisors (1).

9951044989 is an equidigital number, since it uses as much as digits as its factorization.

9951044989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 58.

The square root of 9951044989 is about 99754.9246353282. The cubic root of 9951044989 is about 2150.9132582424.

The spelling of 9951044989 in words is "nine billion, nine hundred fifty-one million, forty-four thousand, nine hundred eighty-nine".