247021007 has 2 divisors, whose sum is σ = 247021008. Its totient is φ = 247021006.

The previous prime is 247020979. The next prime is 247021039. The reversal of 247021007 is 700120742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247021007 - 2⁸ = 247020751 is a prime.

It is a super-2 number, since 2×247021007² = 122038755798588098, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247021057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123510503 + 123510504.

It is an arithmetic number, because the mean of its divisors is an integer number (123510504).

Almost surely, 2^247021007 is an apocalyptic number.

247021007 is a deficient number, since it is larger than the sum of its proper divisors (1).

247021007 is an equidigital number, since it uses as much as digits as its factorization.

247021007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 247021007 is about 15716.9019529932. The cubic root of 247021007 is about 627.4483225962.

Adding to 247021007 its reverse (700120742), we get a palindrome (947141749).

The spelling of 247021007 in words is "two hundred forty-seven million, twenty-one thousand, seven".