138794501 has 4 divisors (see below), whose sum is σ = 138821100. Its totient is φ = 138767904.

The previous prime is 138794473. The next prime is 138794507. The reversal of 138794501 is 105497831.

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 69322276 + 69472225 = 8326^2 + 8335^2 .

It is a cyclic number.

It is not a de Polignac number, because 138794501 - 2²² = 134600197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138794507) 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, 2606 + ... + 16863.

It is an arithmetic number, because the mean of its divisors is an integer number (34705275).

Almost surely, 2^138794501 is an apocalyptic number.

It is an amenable number.

138794501 is a deficient number, since it is larger than the sum of its proper divisors (26599).

138794501 is an equidigital number, since it uses as much as digits as its factorization.

138794501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26598.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 138794501 is about 11781.1078002028. The cubic root of 138794501 is about 517.7547436937.

The spelling of 138794501 in words is "one hundred thirty-eight million, seven hundred ninety-four thousand, five hundred one".