207944021 has 2 divisors, whose sum is σ = 207944022. Its totient is φ = 207944020.

The previous prime is 207944003. The next prime is 207944039. The reversal of 207944021 is 120449702.

It is a balanced prime because it is at equal distance from previous prime (207944003) and next prime (207944039).

It can be written as a sum of positive squares in only one way, i.e., 207763396 + 180625 = 14414^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 207944021 - 2²² = 203749717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207941021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103972010 + 103972011.

It is an arithmetic number, because the mean of its divisors is an integer number (103972011).

Almost surely, 2^207944021 is an apocalyptic number.

It is an amenable number.

207944021 is a deficient number, since it is larger than the sum of its proper divisors (1).

207944021 is an equidigital number, since it uses as much as digits as its factorization.

207944021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 207944021 is about 14420.2642486190. The cubic root of 207944021 is about 592.4460558459.

The spelling of 207944021 in words is "two hundred seven million, nine hundred forty-four thousand, twenty-one".