9978527 has 12 divisors (see below), whose sum is σ = 11241384. Its totient is φ = 8804400.

The previous prime is 9978461. The next prime is 9978547. The reversal of 9978527 is 7258799.

It is not a de Polignac number, because 9978527 - 2¹⁰ = 9977503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6152 + ... + 7602.

It is an arithmetic number, because the mean of its divisors is an integer number (936782).

Almost surely, 2^9978527 is an apocalyptic number.

9978527 is a deficient number, since it is larger than the sum of its proper divisors (1262857).

9978527 is a wasteful number, since it uses less digits than its factorization.

9978527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510 (or 1487 counting only the distinct ones).

The product of its digits is 317520, while the sum is 47.

The square root of 9978527 is about 3158.8806561819. The cubic root of 9978527 is about 215.2891512413.

The spelling of 9978527 in words is "nine million, nine hundred seventy-eight thousand, five hundred twenty-seven".