138575769 has 8 divisors (see below), whose sum is σ = 184996032. Its totient is φ = 92269680.

The previous prime is 138575729. The next prime is 138575771. The reversal of 138575769 is 967575831.

138575769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138575769 - 2⁷ = 138575641 is a prime.

It is a super-2 number, since 2×138575769² = 38406487507882722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138575729) 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, 25669 + ... + 30594.

It is an arithmetic number, because the mean of its divisors is an integer number (23124504).

Almost surely, 2^138575769 is an apocalyptic number.

It is an amenable number.

138575769 is a deficient number, since it is larger than the sum of its proper divisors (46420263).

138575769 is an equidigital number, since it uses as much as digits as its factorization.

138575769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57087.

The product of its digits is 1587600, while the sum is 51.

The square root of 138575769 is about 11771.8209721351. The cubic root of 138575769 is about 517.4826169801.

The spelling of 138575769 in words is "one hundred thirty-eight million, five hundred seventy-five thousand, seven hundred sixty-nine".