149993549 has 4 divisors (see below), whose sum is σ = 150018300. Its totient is φ = 149968800.

The previous prime is 149993527. The next prime is 149993573. The reversal of 149993549 is 945399941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 134977924 + 15015625 = 11618^2 + 3875^2 .

It is a cyclic number.

It is not a de Polignac number, because 149993549 - 2²⁴ = 133216333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149993549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149993509) 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, 3527 + ... + 17675.

It is an arithmetic number, because the mean of its divisors is an integer number (37504575).

Almost surely, 2^149993549 is an apocalyptic number.

It is an amenable number.

149993549 is a deficient number, since it is larger than the sum of its proper divisors (24751).

149993549 is a wasteful number, since it uses less digits than its factorization.

149993549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24750.

The product of its digits is 1574640, while the sum is 53.

The square root of 149993549 is about 12247.1853501121. The cubic root of 149993549 is about 531.3216675816.

The spelling of 149993549 in words is "one hundred forty-nine million, nine hundred ninety-three thousand, five hundred forty-nine".