137548639 has 2 divisors, whose sum is σ = 137548640. Its totient is φ = 137548638.

The previous prime is 137548637. The next prime is 137548693. The reversal of 137548639 is 936845731.

Together with next prime (137548693) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (936845731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137548639 - 2¹ = 137548637 is a prime.

Together with 137548637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137548633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68774319 + 68774320.

It is an arithmetic number, because the mean of its divisors is an integer number (68774320).

Almost surely, 2^137548639 is an apocalyptic number.

137548639 is a deficient number, since it is larger than the sum of its proper divisors (1).

137548639 is an equidigital number, since it uses as much as digits as its factorization.

137548639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 137548639 is about 11728.1131901086. The cubic root of 137548639 is about 516.2009100353.

The spelling of 137548639 in words is "one hundred thirty-seven million, five hundred forty-eight thousand, six hundred thirty-nine".