9706978577 has 4 divisors (see below), whose sum is σ = 9708047796. Its totient is φ = 9705909360.

The previous prime is 9706978553. The next prime is 9706978583. The reversal of 9706978577 is 7758796079.

It is a Cunningham number, because it is equal to 98524²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7758796079 = 191 ⋅40621969.

It can be written as a sum of positive squares in 2 ways, for example, as 1279922176 + 8427056401 = 35776^2 + 91799^2 .

It is a cyclic number.

It is not a de Polignac number, because 9706978577 - 2⁸ = 9706978321 is a prime.

It is a super-3 number, since 3×9706978577³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9706978517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520874 + ... + 539187.

It is an arithmetic number, because the mean of its divisors is an integer number (2427011949).

Almost surely, 2^9706978577 is an apocalyptic number.

It is an amenable number.

9706978577 is a deficient number, since it is larger than the sum of its proper divisors (1069219).

9706978577 is a wasteful number, since it uses less digits than its factorization.

9706978577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069218.

The product of its (nonzero) digits is 46675440, while the sum is 65.

The square root of 9706978577 is about 98524.0000050749. Note that the first 5 decimals coincide. The cubic root of 9706978577 is about 2133.1825565612.

The spelling of 9706978577 in words is "nine billion, seven hundred six million, nine hundred seventy-eight thousand, five hundred seventy-seven".