8439961 has 2 divisors, whose sum is σ = 8439962. Its totient is φ = 8439960.

The previous prime is 8439953. The next prime is 8439989. The reversal of 8439961 is 1699348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4995225 + 3444736 = 2235^2 + 1856^2 .

It is a cyclic number.

It is not a de Polignac number, because 8439961 - 2³ = 8439953 is a prime.

It is not a weakly prime, because it can be changed into another prime (8439901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4219980 + 4219981.

It is an arithmetic number, because the mean of its divisors is an integer number (4219981).

Almost surely, 2^8439961 is an apocalyptic number.

It is an amenable number.

8439961 is a deficient number, since it is larger than the sum of its proper divisors (1).

8439961 is an equidigital number, since it uses as much as digits as its factorization.

8439961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 8439961 is about 2905.1610970822. The cubic root of 8439961 is about 203.6011124517.

The spelling of 8439961 in words is "eight million, four hundred thirty-nine thousand, nine hundred sixty-one".