138764065 has 8 divisors (see below), whose sum is σ = 181654848. Its totient is φ = 100919280.

The previous prime is 138764063. The next prime is 138764077. The reversal of 138764065 is 560467831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138764065 - 2¹ = 138764063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138764063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1261437 + ... + 1261546.

It is an arithmetic number, because the mean of its divisors is an integer number (22706856).

Almost surely, 2^138764065 is an apocalyptic number.

It is an amenable number.

138764065 is a deficient number, since it is larger than the sum of its proper divisors (42890783).

138764065 is a wasteful number, since it uses less digits than its factorization.

138764065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522999.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 138764065 is about 11779.8160002608. The cubic root of 138764065 is about 517.7168950871.

The spelling of 138764065 in words is "one hundred thirty-eight million, seven hundred sixty-four thousand, sixty-five".