8389961 has 4 divisors (see below), whose sum is σ = 8679300. Its totient is φ = 8100624.

The previous prime is 8389957. The next prime is 8389967. The reversal of 8389961 is 1699838.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2839225 + 5550736 = 1685^2 + 2356^2 .

It is a cyclic number.

It is not a de Polignac number, because 8389961 - 2² = 8389957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8389967) 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, 144626 + ... + 144683.

It is an arithmetic number, because the mean of its divisors is an integer number (2169825).

Almost surely, 2^8389961 is an apocalyptic number.

It is an amenable number.

8389961 is a deficient number, since it is larger than the sum of its proper divisors (289339).

8389961 is a wasteful number, since it uses less digits than its factorization.

8389961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289338.

The product of its digits is 93312, while the sum is 44.

The square root of 8389961 is about 2896.5429394366. The cubic root of 8389961 is about 203.1982581045.

The spelling of 8389961 in words is "eight million, three hundred eighty-nine thousand, nine hundred sixty-one".