9778971 has 8 divisors (see below), whose sum is σ = 13252624. Its totient is φ = 6412320.

The previous prime is 9778969. The next prime is 9778973. The reversal of 9778971 is 1798779.

It is an interprime number because it is at equal distance from previous prime (9778969) and next prime (9778973).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9778971 - 2¹ = 9778969 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 9778971.

It is not an unprimeable number, because it can be changed into a prime (9778973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26536 + ... + 26901.

It is an arithmetic number, because the mean of its divisors is an integer number (1656578).

Almost surely, 2^9778971 is an apocalyptic number.

9778971 is a deficient number, since it is larger than the sum of its proper divisors (3473653).

9778971 is a wasteful number, since it uses less digits than its factorization.

9778971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53501.

The product of its digits is 222264, while the sum is 48.

The square root of 9778971 is about 3127.1346309361. The cubic root of 9778971 is about 213.8443200578.

The spelling of 9778971 in words is "nine million, seven hundred seventy-eight thousand, nine hundred seventy-one".