138570361 has 2 divisors, whose sum is σ = 138570362. Its totient is φ = 138570360.

The previous prime is 138570353. The next prime is 138570437. The reversal of 138570361 is 163075831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115347600 + 23222761 = 10740^2 + 4819^2 .

It is a cyclic number.

It is not a de Polignac number, because 138570361 - 2³ = 138570353 is a prime.

It is not a weakly prime, because it can be changed into another prime (138570301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69285180 + 69285181.

It is an arithmetic number, because the mean of its divisors is an integer number (69285181).

Almost surely, 2^138570361 is an apocalyptic number.

It is an amenable number.

138570361 is a deficient number, since it is larger than the sum of its proper divisors (1).

138570361 is an equidigital number, since it uses as much as digits as its factorization.

138570361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 138570361 is about 11771.5912688132. The cubic root of 138570361 is about 517.4758852058.

The spelling of 138570361 in words is "one hundred thirty-eight million, five hundred seventy thousand, three hundred sixty-one".