847969 has 2 divisors, whose sum is σ = 847970. Its totient is φ = 847968.

The previous prime is 847967. The next prime is 847991. The reversal of 847969 is 969748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 833569 + 14400 = 913^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 847969 - 2¹ = 847967 is a prime.

It is a super-2 number, since 2×847969² = 1438102849922, which contains 22 as substring.

Together with 847967, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (847967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423984 + 423985.

It is an arithmetic number, because the mean of its divisors is an integer number (423985).

2⁸⁴⁷⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

847969 is a deficient number, since it is larger than the sum of its proper divisors (1).

847969 is an equidigital number, since it uses as much as digits as its factorization.

847969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 847969 is about 920.8523225795. The cubic root of 847969 is about 94.6513164183.

The spelling of 847969 in words is "eight hundred forty-seven thousand, nine hundred sixty-nine".