9977923 has 2 divisors, whose sum is σ = 9977924. Its totient is φ = 9977922.

The previous prime is 9977921. The next prime is 9977951. The reversal of 9977923 is 3297799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9977923 - 2¹ = 9977921 is a prime.

Together with 9977921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9977921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988961 + 4988962.

It is an arithmetic number, because the mean of its divisors is an integer number (4988962).

Almost surely, 2^9977923 is an apocalyptic number.

9977923 is a deficient number, since it is larger than the sum of its proper divisors (1).

9977923 is an equidigital number, since it uses as much as digits as its factorization.

9977923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 214326, while the sum is 46.

The square root of 9977923 is about 3158.7850512499. The cubic root of 9977923 is about 215.2848073379.

The spelling of 9977923 in words is "nine million, nine hundred seventy-seven thousand, nine hundred twenty-three".