9998977 has 2 divisors, whose sum is σ = 9998978. Its totient is φ = 9998976.

The previous prime is 9998971. The next prime is 9999047. The reversal of 9998977 is 7798999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9991921 + 7056 = 3161^2 + 84^2 .

It is a cyclic number.

It is not a de Polignac number, because 9998977 - 2³ = 9998969 is a prime.

It is not a weakly prime, because it can be changed into another prime (9998971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999488 + 4999489.

It is an arithmetic number, because the mean of its divisors is an integer number (4999489).

Almost surely, 2^9998977 is an apocalyptic number.

It is an amenable number.

9998977 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998977 is an equidigital number, since it uses as much as digits as its factorization.

9998977 is an evil number, because the sum of its binary digits is even.

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

The square root of 9998977 is about 3162.1159055291. The cubic root of 9998977 is about 215.4361221304.

The spelling of 9998977 in words is "nine million, nine hundred ninety-eight thousand, nine hundred seventy-seven".