137749549 has 4 divisors (see below), whose sum is σ = 157428064. Its totient is φ = 118071036.

The previous prime is 137749543. The next prime is 137749567. The reversal of 137749549 is 945947731.

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 not a de Polignac number, because 137749549 - 2³ = 137749541 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 (137749541) 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, 9839247 + ... + 9839260.

It is an arithmetic number, because the mean of its divisors is an integer number (39357016).

Almost surely, 2^137749549 is an apocalyptic number.

It is an amenable number.

137749549 is a deficient number, since it is larger than the sum of its proper divisors (19678515).

137749549 is an equidigital number, since it uses as much as digits as its factorization.

137749549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19678514.

The product of its digits is 952560, while the sum is 49.

The square root of 137749549 is about 11736.6753810438. The cubic root of 137749549 is about 516.4521168618.

The spelling of 137749549 in words is "one hundred thirty-seven million, seven hundred forty-nine thousand, five hundred forty-nine".