9777641 has 4 divisors (see below), whose sum is σ = 10005072. Its totient is φ = 9550212.

The previous prime is 9777637. The next prime is 9777653. The reversal of 9777641 is 1467779.

9777641 is digitally balanced in base 2 and base 3, because in such bases 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9777641 - 2² = 9777637 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9777631) 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, 113651 + ... + 113736.

It is an arithmetic number, because the mean of its divisors is an integer number (2501268).

Almost surely, 2^9777641 is an apocalyptic number.

It is an amenable number.

9777641 is a deficient number, since it is larger than the sum of its proper divisors (227431).

9777641 is a wasteful number, since it uses less digits than its factorization.

9777641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227430.

The product of its digits is 74088, while the sum is 41.

The square root of 9777641 is about 3126.9219689656. The cubic root of 9777641 is about 213.8346249055.

The spelling of 9777641 in words is "nine million, seven hundred seventy-seven thousand, six hundred forty-one".