138545101 has 4 divisors (see below), whose sum is σ = 138638304. Its totient is φ = 138451900.

The previous prime is 138545089. The next prime is 138545111. The reversal of 138545101 is 101545831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101545831 = 487 ⋅208513.

It is a cyclic number.

It is not a de Polignac number, because 138545101 - 2⁹ = 138544589 is a prime.

It is a super-2 number, since 2×138545101² = 38389490022200402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138545101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138545111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44335 + ... + 47356.

It is an arithmetic number, because the mean of its divisors is an integer number (34659576).

Almost surely, 2^138545101 is an apocalyptic number.

It is an amenable number.

138545101 is a deficient number, since it is larger than the sum of its proper divisors (93203).

138545101 is an equidigital number, since it uses as much as digits as its factorization.

138545101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93202.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 138545101 is about 11770.5182978491. The cubic root of 138545101 is about 517.4444397242. Note that the first 4 decimals are identical.

The spelling of 138545101 in words is "one hundred thirty-eight million, five hundred forty-five thousand, one hundred one".