647099 has 2 divisors, whose sum is σ = 647100. Its totient is φ = 647098.

The previous prime is 647081. The next prime is 647111. The reversal of 647099 is 990746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647099 - 2⁸ = 646843 is a prime.

It is a Sophie Germain prime.

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, 323549 + 323550.

It is an arithmetic number, because the mean of its divisors is an integer number (323550).

2⁶⁴⁷⁰⁹⁹ is an apocalyptic number.

647099 is a deficient number, since it is larger than the sum of its proper divisors (1).

647099 is an equidigital number, since it uses as much as digits as its factorization.

647099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 647099 is about 804.4246391055. The cubic root of 647099 is about 86.4948486134.

The spelling of 647099 in words is "six hundred forty-seven thousand, ninety-nine".