138761201 has 4 divisors (see below), whose sum is σ = 143546100. Its totient is φ = 133976304.

The previous prime is 138761197. The next prime is 138761213. The reversal of 138761201 is 102167831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69288976 + 69472225 = 8324^2 + 8335^2 .

It is a cyclic number.

It is not a de Polignac number, because 138761201 - 2² = 138761197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 4784869 = 138761201 / (1 + 3 + 8 + 7 + 6 + 1 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138761801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2392406 + ... + 2392463.

It is an arithmetic number, because the mean of its divisors is an integer number (35886525).

Almost surely, 2^138761201 is an apocalyptic number.

It is an amenable number.

138761201 is a deficient number, since it is larger than the sum of its proper divisors (4784899).

138761201 is an equidigital number, since it uses as much as digits as its factorization.

138761201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784898.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 138761201 is about 11779.6944357653. The cubic root of 138761201 is about 517.7133332827.

The spelling of 138761201 in words is "one hundred thirty-eight million, seven hundred sixty-one thousand, two hundred one".