9977645 has 4 divisors (see below), whose sum is σ = 11973180. Its totient is φ = 7982112.

The previous prime is 9977633. The next prime is 9977651. The reversal of 9977645 is 5467799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3076516 + 6901129 = 1754^2 + 2627^2 .

It is a cyclic number.

It is not a de Polignac number, because 9977645 - 2⁶ = 9977581 is a prime.

It is a super-3 number, since 3×9977645³ (a number of 22 digits) contains 333 as substring.

It is a d-powerful number, because it can be written as 9⁵ + 9⁷ + 7⁶ + 7⁷ + 6 + 4¹¹ + 5³ .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9977645.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 997760 + ... + 997769.

It is an arithmetic number, because the mean of its divisors is an integer number (2993295).

Almost surely, 2^9977645 is an apocalyptic number.

It is an amenable number.

9977645 is a deficient number, since it is larger than the sum of its proper divisors (1995535).

9977645 is a wasteful number, since it uses less digits than its factorization.

9977645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995534.

The product of its digits is 476280, while the sum is 47.

The square root of 9977645 is about 3158.7410466830. The cubic root of 9977645 is about 215.2828079327.

The spelling of 9977645 in words is "nine million, nine hundred seventy-seven thousand, six hundred forty-five".