9813977 has 4 divisors (see below), whose sum is σ = 10152420. Its totient is φ = 9475536.

The previous prime is 9813971. The next prime is 9813997. The reversal of 9813977 is 7793189.

9813977 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7793189 = 2341 ⋅3329.

It can be written as a sum of positive squares in 2 ways, for example, as 5470921 + 4343056 = 2339^2 + 2084^2 .

It is a cyclic number.

It is not a de Polignac number, because 9813977 - 2⁴ = 9813961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9813971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169178 + ... + 169235.

It is an arithmetic number, because the mean of its divisors is an integer number (2538105).

Almost surely, 2^9813977 is an apocalyptic number.

It is an amenable number.

9813977 is a deficient number, since it is larger than the sum of its proper divisors (338443).

9813977 is a wasteful number, since it uses less digits than its factorization.

9813977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338442.

The product of its digits is 95256, while the sum is 44.

The square root of 9813977 is about 3132.7267675302. The cubic root of 9813977 is about 214.0991839417.

The spelling of 9813977 in words is "nine million, eight hundred thirteen thousand, nine hundred seventy-seven".