9977543 has 4 divisors (see below), whose sum is σ = 9994800. Its totient is φ = 9960288.

The previous prime is 9977519. The next prime is 9977551. The reversal of 9977543 is 3457799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3457799 = 1061 ⋅3259.

It is a cyclic number.

It is not a de Polignac number, because 9977543 - 2⁸ = 9977287 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9977494 and 9977503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977503) 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 3 ways as a sum of consecutive naturals, for example, 7730 + ... + 8927.

It is an arithmetic number, because the mean of its divisors is an integer number (2498700).

Almost surely, 2^9977543 is an apocalyptic number.

9977543 is a deficient number, since it is larger than the sum of its proper divisors (17257).

9977543 is a wasteful number, since it uses less digits than its factorization.

9977543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17256.

The product of its digits is 238140, while the sum is 44.

The square root of 9977543 is about 3158.7249009687. The cubic root of 9977543 is about 215.2820743287.

The spelling of 9977543 in words is "nine million, nine hundred seventy-seven thousand, five hundred forty-three".