9779961 has 4 divisors (see below), whose sum is σ = 13039952. Its totient is φ = 6519972.

The previous prime is 9779941. The next prime is 9779969. The reversal of 9779961 is 1699779.

9779961 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9779961 - 2⁵ = 9779929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9779961.

It is not an unprimeable number, because it can be changed into a prime (9779969) 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, 1629991 + ... + 1629996.

It is an arithmetic number, because the mean of its divisors is an integer number (3259988).

Almost surely, 2^9779961 is an apocalyptic number.

It is an amenable number.

9779961 is a deficient number, since it is larger than the sum of its proper divisors (3259991).

9779961 is a wasteful number, since it uses less digits than its factorization.

9779961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259990.

The product of its digits is 214326, while the sum is 48.

The square root of 9779961 is about 3127.2929188037. The cubic root of 9779961 is about 213.8515361795.

The spelling of 9779961 in words is "nine million, seven hundred seventy-nine thousand, nine hundred sixty-one".