138964569 has 8 divisors (see below), whose sum is σ = 188782272. Its totient is φ = 90894960.

The previous prime is 138964561. The next prime is 138964589. The reversal of 138964569 is 965469831.

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

It is not a de Polignac number, because 138964569 - 2³ = 138964561 is a prime.

It is a super-2 number, since 2×138964569² = 38622302874711522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138964561) 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, 436837 + ... + 437154.

It is an arithmetic number, because the mean of its divisors is an integer number (23597784).

Almost surely, 2^138964569 is an apocalyptic number.

It is an amenable number.

138964569 is a deficient number, since it is larger than the sum of its proper divisors (49817703).

138964569 is an equidigital number, since it uses as much as digits as its factorization.

138964569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874047.

The product of its digits is 1399680, while the sum is 51.

The square root of 138964569 is about 11788.3234176875. The cubic root of 138964569 is about 517.9661295266.

The spelling of 138964569 in words is "one hundred thirty-eight million, nine hundred sixty-four thousand, five hundred sixty-nine".