207028649 has 2 divisors, whose sum is σ = 207028650. Its totient is φ = 207028648.

The previous prime is 207028637. The next prime is 207028667. The reversal of 207028649 is 946820702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192321424 + 14707225 = 13868^2 + 3835^2 .

It is a cyclic number.

It is not a de Polignac number, because 207028649 - 2¹² = 207024553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (207028609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103514324 + 103514325.

It is an arithmetic number, because the mean of its divisors is an integer number (103514325).

Almost surely, 2^207028649 is an apocalyptic number.

It is an amenable number.

207028649 is a deficient number, since it is larger than the sum of its proper divisors (1).

207028649 is an equidigital number, since it uses as much as digits as its factorization.

207028649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 207028649 is about 14388.4901570665. The cubic root of 207028649 is about 591.5754589906.

The spelling of 207028649 in words is "two hundred seven million, twenty-eight thousand, six hundred forty-nine".