138547445 has 4 divisors (see below), whose sum is σ = 166256940. Its totient is φ = 110837952.

The previous prime is 138547439. The next prime is 138547511. The reversal of 138547445 is 544745831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31259281 + 107288164 = 5591^2 + 10358^2 .

It is a cyclic number.

It is not a de Polignac number, because 138547445 - 2⁴ = 138547429 is a prime.

It is a congruent number.

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, 13854740 + ... + 13854749.

It is an arithmetic number, because the mean of its divisors is an integer number (41564235).

Almost surely, 2^138547445 is an apocalyptic number.

It is an amenable number.

138547445 is a deficient number, since it is larger than the sum of its proper divisors (27709495).

138547445 is an equidigital number, since it uses as much as digits as its factorization.

138547445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27709494.

The product of its digits is 268800, while the sum is 41.

The square root of 138547445 is about 11770.6178682344. The cubic root of 138547445 is about 517.4473578665.

It can be divided in two parts, 13 and 8547445, that added together give a palindrome (8547458).

The spelling of 138547445 in words is "one hundred thirty-eight million, five hundred forty-seven thousand, four hundred forty-five".