138547837 has 4 divisors (see below), whose sum is σ = 144571680. Its totient is φ = 132523996.

The previous prime is 138547781. The next prime is 138547847. The reversal of 138547837 is 738745831.

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: 738745831 = 41 ⋅18018191.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138547837 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 (138547847) 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, 3011887 + ... + 3011932.

It is an arithmetic number, because the mean of its divisors is an integer number (36142920).

Almost surely, 2^138547837 is an apocalyptic number.

It is an amenable number.

138547837 is a deficient number, since it is larger than the sum of its proper divisors (6023843).

138547837 is an equidigital number, since it uses as much as digits as its factorization.

138547837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6023842.

The product of its digits is 564480, while the sum is 46.

The square root of 138547837 is about 11770.6345198549. The cubic root of 138547837 is about 517.4478458802.

The spelling of 138547837 in words is "one hundred thirty-eight million, five hundred forty-seven thousand, eight hundred thirty-seven".