138760669 has 4 divisors (see below), whose sum is σ = 138787740. Its totient is φ = 138733600.

The previous prime is 138760639. The next prime is 138760697. The reversal of 138760669 is 966067831.

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 580644 + 138180025 = 762^2 + 11755^2 .

It is a cyclic number.

It is not a de Polignac number, because 138760669 - 2¹⁷ = 138629597 is a prime.

It is a super-2 number, since 2×138760669² = 38509046522655122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138760639) 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, 3232 + ... + 16969.

It is an arithmetic number, because the mean of its divisors is an integer number (34696935).

Almost surely, 2^138760669 is an apocalyptic number.

It is an amenable number.

138760669 is a deficient number, since it is larger than the sum of its proper divisors (27071).

138760669 is an equidigital number, since it uses as much as digits as its factorization.

138760669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27070.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 138760669 is about 11779.6718545128. The cubic root of 138760669 is about 517.7126716572.

The spelling of 138760669 in words is "one hundred thirty-eight million, seven hundred sixty thousand, six hundred sixty-nine".