137238449 has 4 divisors (see below), whose sum is σ = 140158464. Its totient is φ = 134318436.

The previous prime is 137238443. The next prime is 137238481. The reversal of 137238449 is 944832731.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137238449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137238443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1459937 + ... + 1460030.

It is an arithmetic number, because the mean of its divisors is an integer number (35039616).

Almost surely, 2^137238449 is an apocalyptic number.

It is an amenable number.

137238449 is a deficient number, since it is larger than the sum of its proper divisors (2920015).

137238449 is an equidigital number, since it uses as much as digits as its factorization.

137238449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920014.

The product of its digits is 145152, while the sum is 41.

The square root of 137238449 is about 11714.8815188204. The cubic root of 137238449 is about 515.8125846727.

The spelling of 137238449 in words is "one hundred thirty-seven million, two hundred thirty-eight thousand, four hundred forty-nine".