138686801 has 8 divisors (see below), whose sum is σ = 154514304. Its totient is φ = 123395920.

The previous prime is 138686797. The next prime is 138686809. The reversal of 138686801 is 108686831.

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

It is a cyclic number.

It is not a de Polignac number, because 138686801 - 2² = 138686797 is a prime.

It is a super-2 number, since 2×138686801² = 38468057543227202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138686809) 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, 133610 + ... + 134643.

It is an arithmetic number, because the mean of its divisors is an integer number (19314288).

Almost surely, 2^138686801 is an apocalyptic number.

138686801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

138686801 is a deficient number, since it is larger than the sum of its proper divisors (15827503).

138686801 is a wasteful number, since it uses less digits than its factorization.

138686801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268311.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 138686801 is about 11776.5360356940. The cubic root of 138686801 is about 517.6207887822.

The spelling of 138686801 in words is "one hundred thirty-eight million, six hundred eighty-six thousand, eight hundred one".