647069 has 2 divisors, whose sum is σ = 647070. Its totient is φ = 647068.

The previous prime is 647057. The next prime is 647081. The reversal of 647069 is 960746.

It is a balanced prime because it is at equal distance from previous prime (647057) and next prime (647081).

It can be written as a sum of positive squares in only one way, i.e., 344569 + 302500 = 587^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 647069 - 2¹² = 642973 is a prime.

It is a super-2 number, since 2×647069² = 837396581522, which contains 22 as substring.

It is a nialpdrome in base 7.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323534 + 323535.

It is an arithmetic number, because the mean of its divisors is an integer number (323535).

2⁶⁴⁷⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

647069 is a deficient number, since it is larger than the sum of its proper divisors (1).

647069 is an equidigital number, since it uses as much as digits as its factorization.

647069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 647069 is about 804.4059920214. The cubic root of 647069 is about 86.4935119372.

The spelling of 647069 in words is "six hundred forty-seven thousand, sixty-nine".