8447057 has 2 divisors, whose sum is σ = 8447058. Its totient is φ = 8447056.

The previous prime is 8447053. The next prime is 8447059. The reversal of 8447057 is 7507448.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6370576 + 2076481 = 2524^2 + 1441^2 .

It is a cyclic number.

It is not a de Polignac number, because 8447057 - 2² = 8447053 is a prime.

It is a super-2 number, since 2×8447057² = 142705543922498, which contains 22 as substring.

Together with 8447059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8447053) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4223528 + 4223529.

It is an arithmetic number, because the mean of its divisors is an integer number (4223529).

Almost surely, 2^8447057 is an apocalyptic number.

It is an amenable number.

8447057 is a deficient number, since it is larger than the sum of its proper divisors (1).

8447057 is an equidigital number, since it uses as much as digits as its factorization.

8447057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 8447057 is about 2906.3821152767. The cubic root of 8447057 is about 203.6581565061.

The spelling of 8447057 in words is "eight million, four hundred forty-seven thousand, fifty-seven".