9999877 has 2 divisors, whose sum is σ = 9999878. Its totient is φ = 9999876.

The previous prime is 9999863. The next prime is 9999883. The reversal of 9999877 is 7789999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8916196 + 1083681 = 2986^2 + 1041^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999877 - 2⁷ = 9999749 is a prime.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999938 + 4999939.

It is an arithmetic number, because the mean of its divisors is an integer number (4999939).

Almost surely, 2^9999877 is an apocalyptic number.

It is an amenable number.

9999877 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999877 is an equidigital number, since it uses as much as digits as its factorization.

9999877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2571912, while the sum is 58.

The square root of 9999877 is about 3162.2582121010. The cubic root of 9999877 is about 215.4425856813.

The spelling of 9999877 in words is "nine million, nine hundred ninety-nine thousand, eight hundred seventy-seven".