138306535 has 8 divisors (see below), whose sum is σ = 166415040. Its totient is φ = 110347104.

The previous prime is 138306527. The next prime is 138306547. The reversal of 138306535 is 535603831.

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 138306535 - 2³ = 138306527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138306535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35215 + ... + 38944.

It is an arithmetic number, because the mean of its divisors is an integer number (20801880).

Almost surely, 2^138306535 is an apocalyptic number.

138306535 is a deficient number, since it is larger than the sum of its proper divisors (28108505).

138306535 is an equidigital number, since it uses as much as digits as its factorization.

138306535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74537.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 138306535 is about 11760.3798833201. The cubic root of 138306535 is about 517.1472667656.

The spelling of 138306535 in words is "one hundred thirty-eight million, three hundred six thousand, five hundred thirty-five".