9979351749 has 12 divisors (see below), whose sum is σ = 14439608716. Its totient is φ = 6641367552.

The previous prime is 9979351729. The next prime is 9979351787. The reversal of 9979351749 is 9471539799.

9979351749 is a `hidden beast` number, since 9 + 9 + 79 + 3 + 517 + 49 = 666.

9979351749 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8596627524 + 1382724225 = 92718^2 + 37185^2 .

It is not a de Polignac number, because 9979351749 - 2⁷ = 9979351621 is a prime.

It is a super-2 number, since 2×9979351749² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979351709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 955654 + ... + 966039.

Almost surely, 2^9979351749 is an apocalyptic number.

It is an amenable number.

9979351749 is a deficient number, since it is larger than the sum of its proper divisors (4460256967).

9979351749 is a wasteful number, since it uses less digits than its factorization.

9979351749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922276 (or 1922273 counting only the distinct ones).

The product of its digits is 19289340, while the sum is 63.

The square root of 9979351749 is about 99896.7053961241. The cubic root of 9979351749 is about 2152.9508246472.

The spelling of 9979351749 in words is "nine billion, nine hundred seventy-nine million, three hundred fifty-one thousand, seven hundred forty-nine".