138669526 has 8 divisors (see below), whose sum is σ = 209592504. Its totient is φ = 68805360.

The previous prime is 138669523. The next prime is 138669547. The reversal of 138669526 is 625966831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138669523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264375 + ... + 264898.

It is an arithmetic number, because the mean of its divisors is an integer number (26199063).

Almost surely, 2^138669526 is an apocalyptic number.

138669526 is a deficient number, since it is larger than the sum of its proper divisors (70922978).

138669526 is a wasteful number, since it uses less digits than its factorization.

138669526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529406.

The product of its digits is 466560, while the sum is 46.

The square root of 138669526 is about 11775.8025628829. The cubic root of 138669526 is about 517.5992960605.

The spelling of 138669526 in words is "one hundred thirty-eight million, six hundred sixty-nine thousand, five hundred twenty-six".