9780688051 has 4 divisors (see below), whose sum is σ = 9780958600. Its totient is φ = 9780417504.

The previous prime is 9780688031. The next prime is 9780688069. The reversal of 9780688051 is 1508860879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1508860879 = 10337 ⋅145967.

It is a cyclic number.

It is not a de Polignac number, because 9780688051 - 2¹⁹ = 9780163763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9780688051.

It is not an unprimeable number, because it can be changed into a prime (9780688031) 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 in 3 ways as a sum of consecutive naturals, for example, 70806 + ... + 156763.

It is an arithmetic number, because the mean of its divisors is an integer number (2445239650).

Almost surely, 2^9780688051 is an apocalyptic number.

9780688051 is a deficient number, since it is larger than the sum of its proper divisors (270549).

9780688051 is a wasteful number, since it uses less digits than its factorization.

9780688051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270548.

The product of its (nonzero) digits is 967680, while the sum is 52.

The square root of 9780688051 is about 98897.3611933099. The cubic root of 9780688051 is about 2138.5683535263.

The spelling of 9780688051 in words is "nine billion, seven hundred eighty million, six hundred eighty-eight thousand, fifty-one".