207039661 has 2 divisors, whose sum is σ = 207039662. Its totient is φ = 207039660.

The previous prime is 207039631. The next prime is 207039683. The reversal of 207039661 is 166930702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199233225 + 7806436 = 14115^2 + 2794^2 .

It is a cyclic number.

It is not a de Polignac number, because 207039661 - 2¹¹ = 207037613 is a prime.

It is equal to p_11446972 and since 207039661 and 11446972 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207039611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103519830 + 103519831.

It is an arithmetic number, because the mean of its divisors is an integer number (103519831).

Almost surely, 2^207039661 is an apocalyptic number.

It is an amenable number.

207039661 is a deficient number, since it is larger than the sum of its proper divisors (1).

207039661 is an equidigital number, since it uses as much as digits as its factorization.

207039661 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 34.

The square root of 207039661 is about 14388.8728189528. The cubic root of 207039661 is about 591.5859475767.

The spelling of 207039661 in words is "two hundred seven million, thirty-nine thousand, six hundred sixty-one".