9790978691 has 24 divisors (see below), whose sum is σ = 11412427824. Its totient is φ = 8345525760.

The previous prime is 9790978663. The next prime is 9790978693. The reversal of 9790978691 is 1968790979.

9790978691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9790978691 - 2⁶ = 9790978627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9790978693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174536 + ... + 223706.

It is an arithmetic number, because the mean of its divisors is an integer number (475517826).

Almost surely, 2^9790978691 is an apocalyptic number.

9790978691 is a deficient number, since it is larger than the sum of its proper divisors (1621449133).

9790978691 is a wasteful number, since it uses less digits than its factorization.

9790978691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49271 (or 49254 counting only the distinct ones).

The product of its (nonzero) digits is 15431472, while the sum is 65.

The square root of 9790978691 is about 98949.3743840758. The cubic root of 9790978691 is about 2139.3181141162.

The spelling of 9790978691 in words is "nine billion, seven hundred ninety million, nine hundred seventy-eight thousand, six hundred ninety-one".