138604511 has 8 divisors (see below), whose sum is σ = 141298560. Its totient is φ = 135922072.

The previous prime is 138604507. The next prime is 138604517. The reversal of 138604511 is 115406831.

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 138604511 - 2² = 138604507 is a prime.

It is a super-2 number, since 2×138604511² = 38422420939098242, 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 (138604517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23486 + ... + 28788.

It is an arithmetic number, because the mean of its divisors is an integer number (17662320).

Almost surely, 2^138604511 is an apocalyptic number.

138604511 is a deficient number, since it is larger than the sum of its proper divisors (2694049).

138604511 is an equidigital number, since it uses as much as digits as its factorization.

138604511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5805.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 138604511 is about 11773.0417055237. The cubic root of 138604511 is about 517.5183915298.

The spelling of 138604511 in words is "one hundred thirty-eight million, six hundred four thousand, five hundred eleven".