138568201 has 2 divisors, whose sum is σ = 138568202. Its totient is φ = 138568200.

The previous prime is 138568189. The next prime is 138568211. The reversal of 138568201 is 102865831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135745801 + 2822400 = 11651^2 + 1680^2 .

It is a cyclic number.

It is not a de Polignac number, because 138568201 - 2¹⁷ = 138437129 is a prime.

It is a super-2 number, since 2×138568201² = 38402292656752802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138568211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69284100 + 69284101.

It is an arithmetic number, because the mean of its divisors is an integer number (69284101).

Almost surely, 2^138568201 is an apocalyptic number.

It is an amenable number.

138568201 is a deficient number, since it is larger than the sum of its proper divisors (1).

138568201 is an equidigital number, since it uses as much as digits as its factorization.

138568201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 138568201 is about 11771.4995221509. The cubic root of 138568201 is about 517.4731964304.

The spelling of 138568201 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, two hundred one".