8398961 has 2 divisors, whose sum is σ = 8398962. Its totient is φ = 8398960.

The previous prime is 8398937. The next prime is 8398967. The reversal of 8398961 is 1698938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8014561 + 384400 = 2831^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 8398961 - 2²² = 4204657 is a prime.

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is not a weakly prime, because it can be changed into another prime (8398967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4199480 + 4199481.

It is an arithmetic number, because the mean of its divisors is an integer number (4199481).

Almost surely, 2^8398961 is an apocalyptic number.

It is an amenable number.

8398961 is a deficient number, since it is larger than the sum of its proper divisors (1).

8398961 is an equidigital number, since it uses as much as digits as its factorization.

8398961 is an odious number, because the sum of its binary digits is odd.

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

The square root of 8398961 is about 2898.0960991658. The cubic root of 8398961 is about 203.2708897808.

The spelling of 8398961 in words is "eight million, three hundred ninety-eight thousand, nine hundred sixty-one".