138456635 has 4 divisors (see below), whose sum is σ = 166147968. Its totient is φ = 110765304.

The previous prime is 138456623. The next prime is 138456671. The reversal of 138456635 is 536654831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138456635 - 2⁸ = 138456379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138456592 and 138456601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13845659 + ... + 13845668.

It is an arithmetic number, because the mean of its divisors is an integer number (41536992).

Almost surely, 2^138456635 is an apocalyptic number.

138456635 is a deficient number, since it is larger than the sum of its proper divisors (27691333).

138456635 is an equidigital number, since it uses as much as digits as its factorization.

138456635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27691332.

The product of its digits is 259200, while the sum is 41.

The square root of 138456635 is about 11766.7597493958. The cubic root of 138456635 is about 517.3342806829.

The spelling of 138456635 in words is "one hundred thirty-eight million, four hundred fifty-six thousand, six hundred thirty-five".