9977761 has 4 divisors (see below), whose sum is σ = 9984132. Its totient is φ = 9971392.

The previous prime is 9977743. The next prime is 9977767. The reversal of 9977761 is 1677799.

9977761 is digitally balanced in base 2, 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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1677799 = 599 ⋅2801.

It can be written as a sum of positive squares in 2 ways, for example, as 2310400 + 7667361 = 1520^2 + 2769^2 .

It is a cyclic number.

It is not a de Polignac number, because 9977761 - 2⁷ = 9977633 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977767) 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, 981 + ... + 4573.

It is an arithmetic number, because the mean of its divisors is an integer number (2496033).

Almost surely, 2^9977761 is an apocalyptic number.

It is an amenable number.

9977761 is a deficient number, since it is larger than the sum of its proper divisors (6371).

9977761 is a wasteful number, since it uses less digits than its factorization.

9977761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6370.

The product of its digits is 166698, while the sum is 46.

The square root of 9977761 is about 3158.7594083754. The cubic root of 9977761 is about 215.2836422214.

The spelling of 9977761 in words is "nine million, nine hundred seventy-seven thousand, seven hundred sixty-one".